57238440 has 64 divisors (see below), whose sum is σ = 196248960. Its totient is φ = 13082880.

The previous prime is 57238411. The next prime is 57238453. The reversal of 57238440 is 4483275.

57238440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33231 + ... + 34910.

It is an arithmetic number, because the mean of its divisors is an integer number (3066390).

Almost surely, 2^57238440 is an apocalyptic number.

It is an amenable number.

57238440 is an abundant number, since it is smaller than the sum of its proper divisors (139010520).

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

57238440 is a wasteful number, since it uses less digits than its factorization.

57238440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68162 (or 68158 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 57238440 is about 7565.6090303425. The cubic root of 57238440 is about 385.3859961894.

The spelling of 57238440 in words is "fifty-seven million, two hundred thirty-eight thousand, four hundred forty".