57731968 has 32 divisors (see below), whose sum is σ = 131445360. Its totient is φ = 24741888.

The previous prime is 57731963. The next prime is 57732007. The reversal of 57731968 is 86913775.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57731963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31321 + ... + 33112.

Almost surely, 2^57731968 is an apocalyptic number.

It is an amenable number.

57731968 is an abundant number, since it is smaller than the sum of its proper divisors (73713392).

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

57731968 is an equidigital number, since it uses as much as digits as its factorization.

57731968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64454 (or 64442 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 57731968 is about 7598.1555656620. The cubic root of 57731968 is about 386.4904680100.

The spelling of 57731968 in words is "fifty-seven million, seven hundred thirty-one thousand, nine hundred sixty-eight".