57801978 has 32 divisors (see below), whose sum is σ = 138331200. Its totient is φ = 17785008.

The previous prime is 57801917. The next prime is 57801983. The reversal of 57801978 is 87910875.

57801978 is a `hidden beast` number, since 578 + 0 + 1 + 9 + 78 = 666.

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, 40468 + ... + 41871.

It is an arithmetic number, because the mean of its divisors is an integer number (4322850).

Almost surely, 2^57801978 is an apocalyptic number.

57801978 is an abundant number, since it is smaller than the sum of its proper divisors (80529222).

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

57801978 is a wasteful number, since it uses less digits than its factorization.

57801978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82363 (or 82357 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 57801978 is about 7602.7612089293. The cubic root of 57801978 is about 386.6466337554.

The spelling of 57801978 in words is "fifty-seven million, eight hundred one thousand, nine hundred seventy-eight".