57231928 has 32 divisors (see below), whose sum is σ = 122366160. Its totient is φ = 24860160.

The previous prime is 57231919. The next prime is 57231929. The reversal of 57231928 is 82913275.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57231929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14418 + ... + 17953.

Almost surely, 2^57231928 is an apocalyptic number.

It is an amenable number.

57231928 is an abundant number, since it is smaller than the sum of its proper divisors (65134232).

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

57231928 is a wasteful number, since it uses less digits than its factorization.

57231928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32407 (or 32403 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 57231928 is about 7565.1786495760. The cubic root of 57231928 is about 385.3713805524.

The spelling of 57231928 in words is "fifty-seven million, two hundred thirty-one thousand, nine hundred twenty-eight".