57347728 has 20 divisors (see below), whose sum is σ = 111257388. Its totient is φ = 28636160.

The previous prime is 57347723. The next prime is 57347729. The reversal of 57347728 is 82774375.

It can be written as a sum of positive squares in 2 ways, for example, as 24720784 + 32626944 = 4972^2 + 5712^2 .

It is not an unprimeable number, because it can be changed into a prime (57347723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13368 + ... + 17128.

Almost surely, 2^57347728 is an apocalyptic number.

It is an amenable number.

57347728 is a deficient number, since it is larger than the sum of its proper divisors (53909660).

57347728 is a wasteful number, since it uses less digits than its factorization.

57347728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722 (or 4716 counting only the distinct ones).

The product of its digits is 329280, while the sum is 43.

The square root of 57347728 is about 7572.8282695437. The cubic root of 57347728 is about 385.6311186814.

The spelling of 57347728 in words is "fifty-seven million, three hundred forty-seven thousand, seven hundred twenty-eight".