57215680 has 28 divisors (see below), whose sum is σ = 136245600. Its totient is φ = 22886144.

The previous prime is 57215657. The next prime is 57215723. The reversal of 57215680 is 8651275.

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, 89080 + ... + 89719.

Almost surely, 2^57215680 is an apocalyptic number.

It is an amenable number.

57215680 is an abundant number, since it is smaller than the sum of its proper divisors (79029920).

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

57215680 is a wasteful number, since it uses less digits than its factorization.

57215680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178816 (or 178806 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 57215680 is about 7564.1047057798. The cubic root of 57215680 is about 385.3349084464.

The spelling of 57215680 in words is "fifty-seven million, two hundred fifteen thousand, six hundred eighty".