38612691 has 24 divisors (see below), whose sum is σ = 60287136. Its totient is φ = 23673600.

The previous prime is 38612683. The next prime is 38612713. The reversal of 38612691 is 19621683.

38612691 is a `hidden beast` number, since 38 + 612 + 6 + 9 + 1 = 666.

It is not a de Polignac number, because 38612691 - 2³ = 38612683 is a prime.

It is a super-2 number, since 2×38612691² = 2981879812522962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38612681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46506 + ... + 47328.

It is an arithmetic number, because the mean of its divisors is an integer number (2511964).

Almost surely, 2^38612691 is an apocalyptic number.

38612691 is a deficient number, since it is larger than the sum of its proper divisors (21674445).

38612691 is a wasteful number, since it uses less digits than its factorization.

38612691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1240 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 38612691 is about 6213.9110872300. The cubic root of 38612691 is about 337.9948034401.

The spelling of 38612691 in words is "thirty-eight million, six hundred twelve thousand, six hundred ninety-one".