57276780 has 48 divisors (see below), whose sum is σ = 174956544. Its totient is φ = 13885120.

The previous prime is 57276767. The next prime is 57276829. The reversal of 57276780 is 8767275.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42732 + ... + 44051.

It is an arithmetic number, because the mean of its divisors is an integer number (3644928).

Almost surely, 2^57276780 is an apocalyptic number.

It is an amenable number.

57276780 is an abundant number, since it is smaller than the sum of its proper divisors (117679764).

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

57276780 is a wasteful number, since it uses less digits than its factorization.

57276780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86806 (or 86804 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 57276780 is about 7568.1424405200. The cubic root of 57276780 is about 385.4720246302.

The spelling of 57276780 in words is "fifty-seven million, two hundred seventy-six thousand, seven hundred eighty".