57312720 has 60 divisors (see below), whose sum is σ = 192477636. Its totient is φ = 15283200.

The previous prime is 57312719. The next prime is 57312737. The reversal of 57312720 is 2721375.

It can be written as a sum of positive squares in 2 ways, for example, as 5817744 + 51494976 = 2412^2 + 7176^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39081 + ... + 40520.

Almost surely, 2^57312720 is an apocalyptic number.

It is an amenable number.

57312720 is an abundant number, since it is smaller than the sum of its proper divisors (135164916).

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

57312720 is a wasteful number, since it uses less digits than its factorization.

57312720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79620 (or 79611 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 57312720 is about 7570.5164949295. The cubic root of 57312720 is about 385.5526330251.

The spelling of 57312720 in words is "fifty-seven million, three hundred twelve thousand, seven hundred twenty".