57220372 has 12 divisors (see below), whose sum is σ = 109238976. Its totient is φ = 26009240.

The previous prime is 57220369. The next prime is 57220399. The reversal of 57220372 is 27302275.

It is a self number, because there is not a number n which added to its sum of digits gives 57220372.

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, 650188 + ... + 650275.

It is an arithmetic number, because the mean of its divisors is an integer number (9103248).

Almost surely, 2^57220372 is an apocalyptic number.

It is an amenable number.

57220372 is a deficient number, since it is larger than the sum of its proper divisors (52018604).

57220372 is a wasteful number, since it uses less digits than its factorization.

57220372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300478 (or 1300476 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 57220372 is about 7564.4148484863. The cubic root of 57220372 is about 385.3454413514.

It can be divided in two parts, 572203 and 72, that added together give a palindrome (572275).

The spelling of 57220372 in words is "fifty-seven million, two hundred twenty thousand, three hundred seventy-two".