57239056 has 30 divisors (see below), whose sum is σ = 129008670. Its totient is φ = 24530688.

The previous prime is 57239053. The next prime is 57239059. The reversal of 57239056 is 65093275.

It is an interprime number because it is at equal distance from previous prime (57239053) and next prime (57239059).

It can be written as a sum of positive squares in only one way, i.e., 40755456 + 16483600 = 6384^2 + 4060^2 .

It is a super-2 number, since 2×57239056² = 6552619063542272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57239053) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 35721 + ... + 37288.

It is an arithmetic number, because the mean of its divisors is an integer number (4300289).

Almost surely, 2^57239056 is an apocalyptic number.

57239056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

57239056 is an abundant number, since it is smaller than the sum of its proper divisors (71769614).

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

57239056 is a wasteful number, since it uses less digits than its factorization.

57239056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73031 (or 73018 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 57239056 is about 7565.6497407691. The cubic root of 57239056 is about 385.3873786922.

The spelling of 57239056 in words is "fifty-seven million, two hundred thirty-nine thousand, fifty-six".