38915972 has 12 divisors (see below), whose sum is σ = 68404560. Its totient is φ = 19371816.

The previous prime is 38915963. The next prime is 38915993. The reversal of 38915972 is 27951983.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20522 + ... + 22337.

It is an arithmetic number, because the mean of its divisors is an integer number (5700380).

Almost surely, 2^38915972 is an apocalyptic number.

It is an amenable number.

38915972 is a deficient number, since it is larger than the sum of its proper divisors (29488588).

38915972 is a wasteful number, since it uses less digits than its factorization.

38915972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43090 (or 43088 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 38915972 is about 6238.2667464609. The cubic root of 38915972 is about 338.8774164271.

It can be divided in two parts, 389 and 15972, that added together give a palindrome (16361).

The spelling of 38915972 in words is "thirty-eight million, nine hundred fifteen thousand, nine hundred seventy-two".