57115840 has 28 divisors (see below), whose sum is σ = 136007856. Its totient is φ = 22846208.

The previous prime is 57115813. The next prime is 57115859. The reversal of 57115840 is 4851175.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88924 + ... + 89563.

Almost surely, 2^57115840 is an apocalyptic number.

It is an amenable number.

57115840 is an abundant number, since it is smaller than the sum of its proper divisors (78892016).

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

57115840 is a wasteful number, since it uses less digits than its factorization.

57115840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178504 (or 178494 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 57115840 is about 7557.5022328809. The cubic root of 57115840 is about 385.1106445356.

The spelling of 57115840 in words is "fifty-seven million, one hundred fifteen thousand, eight hundred forty".