57297720 has 48 divisors (see below), whose sum is σ = 172142280. Its totient is φ = 15257280.

The previous prime is 57297689. The next prime is 57297743. The reversal of 57297720 is 2779275.

57297720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 82575 + ... + 83265.

Almost surely, 2^57297720 is an apocalyptic number.

It is an amenable number.

57297720 is an abundant number, since it is smaller than the sum of its proper divisors (114844560).

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

57297720 is an equidigital number, since it uses as much as digits as its factorization.

57297720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 57297720 is about 7569.5257447214. The cubic root of 57297720 is about 385.5189942209.

The spelling of 57297720 in words is "fifty-seven million, two hundred ninety-seven thousand, seven hundred twenty".