38691972 has 48 divisors (see below), whose sum is σ = 109435200. Its totient is φ = 11724480.

The previous prime is 38691967. The next prime is 38691979. The reversal of 38691972 is 27919683.

It is not an unprimeable number, because it can be changed into a prime (38691979) 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, 15097 + ... + 17472.

It is an arithmetic number, because the mean of its divisors is an integer number (2279900).

Almost surely, 2^38691972 is an apocalyptic number.

It is an amenable number.

38691972 is an abundant number, since it is smaller than the sum of its proper divisors (70743228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38691972 is a wasteful number, since it uses less digits than its factorization.

38691972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32593 (or 32585 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 38691972 is about 6220.2871316363. The cubic root of 38691972 is about 338.2259730919.

The spelling of 38691972 in words is "thirty-eight million, six hundred ninety-one thousand, nine hundred seventy-two".