57115856 has 20 divisors (see below), whose sum is σ = 126471072. Its totient is φ = 24478176.

The previous prime is 57115813. The next prime is 57115859. The reversal of 57115856 is 65851175.

It is a happy number.

It is a super-2 number, since 2×57115856² = 6524442013225472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57115859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254870 + ... + 255093.

Almost surely, 2^57115856 is an apocalyptic number.

57115856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

57115856 is an abundant number, since it is smaller than the sum of its proper divisors (69355216).

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

57115856 is a wasteful number, since it uses less digits than its factorization.

57115856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509978 (or 509972 counting only the distinct ones).

The product of its digits is 42000, while the sum is 38.

The square root of 57115856 is about 7557.5032914316. The cubic root of 57115856 is about 385.1106804963.

The spelling of 57115856 in words is "fifty-seven million, one hundred fifteen thousand, eight hundred fifty-six".