38031681 has 8 divisors (see below), whose sum is σ = 50739040. Its totient is φ = 25339392.

The previous prime is 38031667. The next prime is 38031709. The reversal of 38031681 is 18613083.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38031681 - 2¹⁷ = 37900609 is a prime.

It is a super-2 number, since 2×38031681² = 2892817519371522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38031661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5121 + ... + 10113.

It is an arithmetic number, because the mean of its divisors is an integer number (6342380).

Almost surely, 2^38031681 is an apocalyptic number.

It is an amenable number.

38031681 is a deficient number, since it is larger than the sum of its proper divisors (12707359).

38031681 is a wasteful number, since it uses less digits than its factorization.

38031681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7535.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 38031681 is about 6166.9831360236. The cubic root of 38031681 is about 336.2909452035.

The spelling of 38031681 in words is "thirty-eight million, thirty-one thousand, six hundred eighty-one".