*38! − 1 yields which is the 16th factorial prime.
*There is no answer to the equation φ(''x'') = 38, making 38 a nontotient.
*38 is the sum of the squares of the first three primes.
* 37 and 38 are the first pair of consecutive positive integers not divisible by any of their digits.
*38 is the largest even number which cannot be written as the sum of two odd
composite numbers
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Equivalently, it is a positive integer that has at least one divisor other than 1 and itself. Every positive integer is composite, prime, ...
.
*The sum of each row of the only non-trivial (order 3)
magic hexagon
A magic hexagon of order ''n'' is an arrangement of numbers in a centered hexagonal pattern with ''n'' cells on each edge, in such a way that the numbers in each row, in all three directions, sum to the same magic constant ''M''. A normal magic he ...
strontium
Strontium is the chemical element with the symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly chemically reactive. The metal forms a dark oxide layer when it is ex ...
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
New General Catalogue
The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and ...
spiral galaxy
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''Pisces
In other fields
Thirty-eight is also:
* The
38th parallel north
The 38th parallel north is a circle of latitude that is 38 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. The 38th parallel north formed ...
roulette
Roulette is a casino game named after the French word meaning ''little wheel'' which was likely developed from the Italian game Biribi''.'' In the game, a player may choose to place a bet on a single number, various groupings of numbers, the ...
wheel (0, 00, and 1 through 36; European roulette does not use the 00 slot and has only 37 slots)
* The number of games that each team in a sports league with 20 teams that plays a full home-and-away schedule (with each team playing the others one time home and one time away) will play in a season. The most notable leagues that currently have a 38-game season are the top divisions of association football in England and Spain, respectively the Premier League and La Liga.
* The Ishihara test is a
color vision test
A color vision test is used for measuring color vision against a standard. These tests are most often used to diagnose color vision deficiencies (''color blindness''), though several of the standards are designed to categorize normal color vision ...
consisting of 38
pseudoisochromatic plates
A color vision test is used for measuring color vision against a standard. These tests are most often used to diagnose color vision deficiencies (''color blindness''), though several of the standards are designed to categorize normal color vision i ...
.
*
Bill C-38 Bill C-38 is the name of various legislation introduced into the House of Commons of Canada, including:
* Farm Debt Mediation Act, introduced in 1997 to the second session of the 35th Parliament
* Civil Marriage Act, introduced in 2005 to the only ...
Deuteronomy
Deuteronomy ( grc, Δευτερονόμιον, Deuteronómion, second law) is the fifth and last book of the Torah (in Judaism), where it is called (Hebrew: hbo, , Dəḇārīm, hewords Moses.html"_;"title="f_Moses">f_Moseslabel=none)_and_th ...
.
* A "38" is often the name for a snub nose
.38 caliber
.38 caliber is a frequently used name for the caliber of firearms and firearm cartridges.
The .38 is considered a large firearm cartridge; anything larger than .32 is considered a large caliber.Wright, James D.; Rossi, Peter H.; Daly, Kathleen ...
revolver
* The
38 class
The C38 class (occasionally known as the 38 class and nicknamed "Pacifics" by some railwaymen) was a class of steam locomotive built for the New South Wales Government Railways in Australia.
Constructed between January 1943 and November 1949, ...
is the most famous class of
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomot ...
used in New South Wales
* The number of the French department
Isère
Isère ( , ; frp, Isera; oc, Isèra, ) is a landlocked department in the southeastern French region of Auvergne-Rhône-Alpes. Named after the river Isère, it had a population of 1,271,166 in 2019.over-38 rule" is a feature of the NBA salary cap that affects contracts of players who turn 38 during their deals.
*
Gerald Ford
Gerald Rudolph Ford Jr. ( ; born Leslie Lynch King Jr.; July 14, 1913December 26, 2006) was an American politician who served as the 38th president of the United States from 1974 to 1977. He was the only president never to have been elected ...
Arnold Schwarzenegger
Arnold Alois Schwarzenegger (born July 30, 1947) is an Austrian and American actor, film producer, businessman, retired professional bodybuilder and politician who served as the 38th governor of California between 2003 and 2011. ''Time'' ...
, 38th
Governor of California
The governor of California is the head of government of the U.S. state of California. The governor is the commander-in-chief of the California National Guard and the California State Guard.
Established in the Constitution of California, the g ...
, most recent Republican governor of California, and the second governor to be born outside of the United States
*Cats have a total of 38 chromosomes in their genome.
See also
*
List of highways numbered 38
The following highways are numbered 38:
Australia
* A38 (Sydney)
Canada
* Alberta Highway 38
* Ontario Highway 38 (former)
* Saskatchewan Highway 38
Czech Republic
* I/38 Highway (Czech Republic), I/38 Highway; Czech: :cz:Silnice I/38, Silnice ...