57420724 has 12 divisors (see below), whose sum is σ = 101376324. Its totient is φ = 28456064.

The previous prime is 57420689. The next prime is 57420731. The reversal of 57420724 is 42702475.

It can be written as a sum of positive squares in 2 ways, for example, as 4276624 + 53144100 = 2068^2 + 7290^2 .

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, 63067 + ... + 63970.

It is an arithmetic number, because the mean of its divisors is an integer number (8448027).

Almost surely, 2^57420724 is an apocalyptic number.

It is an amenable number.

57420724 is a deficient number, since it is larger than the sum of its proper divisors (43955600).

57420724 is a wasteful number, since it uses less digits than its factorization.

57420724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127154 (or 127152 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 57420724 is about 7577.6463364293. The cubic root of 57420724 is about 385.7946682821.

The spelling of 57420724 in words is "fifty-seven million, four hundred twenty thousand, seven hundred twenty-four".