57621972 has 24 divisors (see below), whose sum is σ = 134612800. Its totient is φ = 19184256.

The previous prime is 57621947. The next prime is 57621973. The reversal of 57621972 is 27912675.

It is a self number, because there is not a number n which added to its sum of digits gives 57621972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57621973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9729 + ... + 14487.

Almost surely, 2^57621972 is an apocalyptic number.

It is an amenable number.

57621972 is an abundant number, since it is smaller than the sum of its proper divisors (76990828).

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

57621972 is a wasteful number, since it uses less digits than its factorization.

57621972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775 (or 5773 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 57621972 is about 7590.9137789860. The cubic root of 57621972 is about 386.2448534625.

The spelling of 57621972 in words is "fifty-seven million, six hundred twenty-one thousand, nine hundred seventy-two".