57978780 has 24 divisors (see below), whose sum is σ = 162340752. Its totient is φ = 15460992.

The previous prime is 57978779. The next prime is 57978787. The reversal of 57978780 is 8787975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57978787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483097 + ... + 483216.

It is an arithmetic number, because the mean of its divisors is an integer number (6764198).

Almost surely, 2^57978780 is an apocalyptic number.

It is an amenable number.

57978780 is an abundant number, since it is smaller than the sum of its proper divisors (104361972).

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

57978780 is a wasteful number, since it uses less digits than its factorization.

57978780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966325 (or 966323 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 51.

The square root of 57978780 is about 7614.3798171617. The cubic root of 57978780 is about 387.0404514067.

The spelling of 57978780 in words is "fifty-seven million, nine hundred seventy-eight thousand, seven hundred eighty".