57315640 has 16 divisors (see below), whose sum is σ = 128960280. Its totient is φ = 22926240.

The previous prime is 57315617. The next prime is 57315659. The reversal of 57315640 is 4651375.

It is a congruent number.

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, 716406 + ... + 716485.

Almost surely, 2^57315640 is an apocalyptic number.

It is an amenable number.

57315640 is an abundant number, since it is smaller than the sum of its proper divisors (71644640).

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

57315640 is a wasteful number, since it uses less digits than its factorization.

57315640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432902 (or 1432898 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 57315640 is about 7570.7093458936. The cubic root of 57315640 is about 385.5591806965.

The spelling of 57315640 in words is "fifty-seven million, three hundred fifteen thousand, six hundred forty".