57978830 has 80 divisors (see below), whose sum is σ = 133665120. Its totient is φ = 17716608.

The previous prime is 57978829. The next prime is 57978839. The reversal of 57978830 is 3887975.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57978839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1999256 + ... + 1999284.

It is an arithmetic number, because the mean of its divisors is an integer number (1670814).

Almost surely, 2^57978830 is an apocalyptic number.

57978830 is an abundant number, since it is smaller than the sum of its proper divisors (75686290).

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

57978830 is an equidigital number, since it uses as much as digits as its factorization.

57978830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 57978830 is about 7614.3831004225. The cubic root of 57978830 is about 387.0405626659.

The spelling of 57978830 in words is "fifty-seven million, nine hundred seventy-eight thousand, eight hundred thirty".