57918440 has 16 divisors (see below), whose sum is σ = 130316580. Its totient is φ = 23167360.

The previous prime is 57918397. The next prime is 57918461. The reversal of 57918440 is 4481975.

It can be written as a sum of positive squares in 2 ways, for example, as 54671236 + 3247204 = 7394^2 + 1802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 57918394 and 57918403.

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, 723941 + ... + 724020.

Almost surely, 2^57918440 is an apocalyptic number.

It is an amenable number.

57918440 is an abundant number, since it is smaller than the sum of its proper divisors (72398140).

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

57918440 is a wasteful number, since it uses less digits than its factorization.

57918440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447972 (or 1447968 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 57918440 is about 7610.4165457615. The cubic root of 57918440 is about 386.9061371671.

The spelling of 57918440 in words is "fifty-seven million, nine hundred eighteen thousand, four hundred forty".