57556780 has 12 divisors (see below), whose sum is σ = 120869280. Its totient is φ = 23022704.

The previous prime is 57556771. The next prime is 57556783. The reversal of 57556780 is 8765575.

It is not an unprimeable number, because it can be changed into a prime (57556783) 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, 1438900 + ... + 1438939.

It is an arithmetic number, because the mean of its divisors is an integer number (10072440).

Almost surely, 2^57556780 is an apocalyptic number.

It is an amenable number.

57556780 is an abundant number, since it is smaller than the sum of its proper divisors (63312500).

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

57556780 is a wasteful number, since it uses less digits than its factorization.

57556780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877848 (or 2877846 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 43.

The square root of 57556780 is about 7586.6184825652. The cubic root of 57556780 is about 386.0991360355.

The spelling of 57556780 in words is "fifty-seven million, five hundred fifty-six thousand, seven hundred eighty".