30,000 (thirty thousand) is the
natural number that comes after 29,999 and before 30,001.
Selected numbers in the range 30001–39999
30001 to 30999
* 30029 =
primorial prime
* 30030 =
primorial
In mathematics, and more particularly in number theory, primorial, denoted by "#", is a function from natural numbers to natural numbers similar to the factorial function, but rather than successively multiplying positive integers, the function ...
* 30031 = smallest
composite number which is one more than a primorial
* 30203 =
safe prime
* 30240 =
harmonic divisor number
* 30323 =
Sophie Germain prime and safe prime
* 30420 = pentagonal pyramidal number
* 30537 =
Riordan number
* 30694 =
open meandric number
* 30941 = first base 13 repunit prime
31000 to 31999
* 31116 =
octahedral number
* 31337 =
cousin prime, pronounced ''elite'', an alternate way to spell ''
1337
Year 1337 ( MCCCXXXVII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.
Events
January–December
* March 16 – Edward, the Black Prince establishes the Duchy of Cornwall, beco ...
'', an obfuscated alphabet made with numbers and punctuation, known and used in the
gamer
A gamer is a proactive hobbyist who plays interactive games, especially video games, tabletop role-playing games, and skill-based card games, and who plays for usually long periods of time. Some gamers are competitive, meaning they routinely ...
,
hacker, and
BBS cultures.
* 31395 =
square pyramidal number
In mathematics, a pyramid number, or square pyramidal number, is a natural number that counts the number of stacked spheres in a pyramid with a square base. The study of these numbers goes back to Archimedes and Fibonacci. They are part of a broa ...
* 31397 = prime number followed by a record
prime gap of 72, the first greater than 52
* 31688 = the number of years approximately equal to 1 trillion seconds
* 31721 = start of a
prime quadruplet
* 31929 =
Zeisel number
32000 to 32999
* 32043 = smallest number whose
square is
pandigital
In mathematics, a pandigital number is an integer that in a given base has among its significant digits each digit used in the base at least once. For example, 1234567890 (one billion two hundred thirty four million five hundred sixty seven tho ...
.
* 32045 = can be expressed as a sum of two squares in more ways than any smaller number.
* 32760 = harmonic divisor number
* 32761 = 181
2,
centered hexagonal number
In mathematics and combinatorics, a centered hexagonal number, or hex number, is a centered figurate number that represents a hexagon with a dot in the center and all other dots surrounding the center dot in a hexagonal lattice. The following ...
* 32767 = 2
15 − 1, largest positive value for a signed (
two's complement) 16-bit
integer on a computer.
* 32768 = 2
15 = 8
5, maximum
absolute value
In mathematics, the absolute value or modulus of a real number x, is the non-negative value without regard to its sign. Namely, , x, =x if is a positive number, and , x, =-x if x is negative (in which case negating x makes -x positive), an ...
of a negative value for a signed (two's complement) 16-bit
integer on a computer.
* 32800 = pentagonal pyramidal number
* 32993 =
Leyland number
33000 to 33999
* 33333 =
repdigit
* 33461 = Pell number, Markov number
* 33511 = square pyramidal number
* 33781 = octahedral number
34000 to 34999
* 34560 = 5
superfactorial
In mathematics, and more specifically number theory, the superfactorial of a positive integer n is the product of the first n factorials. They are a special case of the Jordan–Pólya numbers, which are products of arbitrary collections of fact ...
* 34790 =
number of non-isomorphic set-systems of weight 13.
* 34841 = start of a prime quadruplet
* 34969 = favorite number of the Muppet character
Count von Count
35000 to 35999
* 35720 = square pyramidal number
* 35840 = number of
ounces in a
long ton (2,240
pounds)
* 35890 =
tribonacci number
* 35899 =
alternating factorial
Alternating may refer to:
Mathematics
* Alternating algebra, an algebra in which odd-grade elements square to zero
* Alternating form, a function formula in algebra
* Alternating group, the group of even permutations of a finite set
* Alternati ...
* 35937 = 33
3, chiliagonal number
* 35964 =
digit-reassembly number Digit-reassembly numbers, or Osiris numbers, are numbers that are equal to the sum of permutations of sub-samples of their own digits (compare the dismemberment and reconstruction of the god Osiris in Egyptian mythology). For example, 132 = 12 + 2 ...
36000 to 36999
* 36100 = sum of the cubes of the first 19 positive integers
* 36463 – number of parallelogram polyominoes with 14 cells
* 36594 = octahedral number
37000 to 37999
* 37378 =
semi-meandric number
* 37634 = third term of the
Lucas–Lehmer sequence
* 37666 =
Markov number
* 37926 = pentagonal pyramidal number
38000 to 38999
* 38024 = square pyramidal number
* 38209 = n such that n , (3
n + 5)
* 38416 = 14
4
* 38807 = number of non-equivalent ways of expressing 10,000,000 as the sum of two prime numbers
* 38962 =
Kaprekar number
39000 to 39999
* 39304 = 34
3
* 39559 = octahedral number
* 39648 = tetranacci number
Primes
There are 958 prime numbers between 30000 and 40000.
References
{{Integers, 10
30000