57792721 has 12 divisors (see below), whose sum is σ = 69049792. Its totient is φ = 47379816.

The previous prime is 57792703. The next prime is 57792727. The reversal of 57792721 is 12729775.

It is a happy number.

It is not a de Polignac number, because 57792721 - 2⁷ = 57792593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57792727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4101 + ... + 11506.

Almost surely, 2^57792721 is an apocalyptic number.

It is an amenable number.

57792721 is a deficient number, since it is larger than the sum of its proper divisors (11257071).

57792721 is a wasteful number, since it uses less digits than its factorization.

57792721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15660 (or 15637 counting only the distinct ones).

The product of its digits is 61740, while the sum is 40.

The square root of 57792721 is about 7602.1523925794. The cubic root of 57792721 is about 386.6259921378.

The spelling of 57792721 in words is "fifty-seven million, seven hundred ninety-two thousand, seven hundred twenty-one".