38159381 has 16 divisors (see below), whose sum is σ = 42108864. Its totient is φ = 34366464.

The previous prime is 38159351. The next prime is 38159393. The reversal of 38159381 is 18395183.

It is a cyclic number.

It is not a de Polignac number, because 38159381 - 2²² = 33965077 is a prime.

It is a super-2 number, since 2×38159381² = 2912276716606322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38159351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167990 + ... + 168216.

It is an arithmetic number, because the mean of its divisors is an integer number (2631804).

Almost surely, 2^38159381 is an apocalyptic number.

It is an amenable number.

38159381 is a deficient number, since it is larger than the sum of its proper divisors (3949483).

38159381 is a wasteful number, since it uses less digits than its factorization.

38159381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its digits is 25920, while the sum is 38.

The square root of 38159381 is about 6177.3279822266. The cubic root of 38159381 is about 336.6669157706. Note that the first 3 decimals are identical.

The spelling of 38159381 in words is "thirty-eight million, one hundred fifty-nine thousand, three hundred eighty-one".