55697928 has 64 divisors (see below), whose sum is σ = 163598400. Its totient is φ = 15578880.

The previous prime is 55697903. The next prime is 55697959. The reversal of 55697928 is 82979655.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4683 + ... + 11546.

It is an arithmetic number, because the mean of its divisors is an integer number (2556225).

Almost surely, 2^55697928 is an apocalyptic number.

It is an amenable number.

55697928 is an abundant number, since it is smaller than the sum of its proper divisors (107900472).

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

55697928 is a wasteful number, since it uses less digits than its factorization.

55697928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16262 (or 16258 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 51.

The square root of 55697928 is about 7463.1044478823. The cubic root of 55697928 is about 381.8970876709.

The spelling of 55697928 in words is "fifty-five million, six hundred ninety-seven thousand, nine hundred twenty-eight".