38 (number)

38 is the natural number following 37 and preceding 39.

List of numbers — Integers << 30 31 32 33 34 35 36 37 38 39 >>
Cardinal	thirty-eight
Ordinal	38th (thirty-eighth)
Factorization	<math>2\cdot 19<math>
Roman numeral	XXXVIII
Binary	100110
Hexadecimal	26

38! - 1 yields 523022617466601111760007224100074291199999999, which is a factorial prime.

There is no answer to the equation φ(x) = 38, making 38 a nontotient.

37 and 38 are the first pair of consecutive positive integers not divisible by any of their digits.

Thirty-eight is also:

• The atomic number of strontium.
• The number of slots on an American Roulette wheel.
• The year A.D. 38, 38 BC, or 1938.