57188380 has 24 divisors (see below), whose sum is σ = 120260448. Its totient is φ = 22843968.

The previous prime is 57188359. The next prime is 57188393. The reversal of 57188380 is 8388175.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17862 + ... + 20818.

It is an arithmetic number, because the mean of its divisors is an integer number (5010852).

Almost surely, 2^57188380 is an apocalyptic number.

It is an amenable number.

57188380 is an abundant number, since it is smaller than the sum of its proper divisors (63072068).

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

57188380 is a wasteful number, since it uses less digits than its factorization.

With its successor (57188381) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (3931).

57188380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3933 (or 3931 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 57188380 is about 7562.2999147085. The cubic root of 57188380 is about 385.2736122157.

The spelling of 57188380 in words is "fifty-seven million, one hundred eighty-eight thousand, three hundred eighty".