38 And 639
38 may refer to: *38 (number), the natural number following 37 and preceding 39 *one of the years 38 BC, AD 38, 1938, 2038 *.38, a caliber of firearms and cartridges **.38 Special, a revolver cartridge *''Thirty-Eight: The Hurricane That Transformed New England'', a 2016 book by Stephen Long *"Thirty Eight", a song by Karma to Burn from the album ''Almost Heathen'', 2001 {{Numberdis ...
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38 (number)
38 (thirty-eight) is the natural number following 37 and preceding 39. In mathematics *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. *The sum of each row of the only non-trivial (order 3) magic hexagon is 38. In science *The atomic number of strontium Astronomy *The Messier object M38, a magnitude 7.0 open cluster in the constellation Auriga *The New General Catalogue object NGC 38, a spiral galaxy in the constellation Pisces In other fields Thirty-eight is also: * The 38th parallel north is the pre-Korean War boundary between North Korea and South Korea. * The number of slots on an American roulette wheel (0, 00, and 1 through 36; European ...
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