57218908 has 12 divisors (see below), whose sum is σ = 101830680. Its totient is φ = 28124432.

The previous prime is 57218897. The next prime is 57218911. The reversal of 57218908 is 80981275.

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, 120991 + ... + 121462.

It is an arithmetic number, because the mean of its divisors is an integer number (8485890).

Almost surely, 2^57218908 is an apocalyptic number.

It is an amenable number.

57218908 is a deficient number, since it is larger than the sum of its proper divisors (44611772).

57218908 is a wasteful number, since it uses less digits than its factorization.

57218908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242516 (or 242514 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 57218908 is about 7564.3180789811. The cubic root of 57218908 is about 385.3421549313.

The spelling of 57218908 in words is "fifty-seven million, two hundred eighteen thousand, nine hundred eight".