57978 has 12 divisors (see below), whose sum is σ = 125658. Its totient is φ = 19320.

The previous prime is 57977. The next prime is 57991. The reversal of 57978 is 87975.

It can be written as a sum of positive squares in only one way, i.e., 42849 + 15129 = 207^2 + 123^2 .

It is a super-2 number, since 2×57978² = 6722896968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1593 + ... + 1628.

2⁵⁷⁹⁷⁸ is an apocalyptic number.

57978 is an abundant number, since it is smaller than the sum of its proper divisors (67680).

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

57978 is a wasteful number, since it uses less digits than its factorization.

57978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229 (or 3226 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 57978 is about 240.7862122299. The cubic root of 57978 is about 38.7038715755.

It can be divided in two parts, 57 and 978, that added together give a triangular number (1035 = T₄₅).

The spelling of 57978 in words is "fifty-seven thousand, nine hundred seventy-eight".