57643978 has 8 divisors (see below), whose sum is σ = 98818272. Its totient is φ = 24704556.

The previous prime is 57643933. The next prime is 57643997. The reversal of 57643978 is 87934675.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2058700 + ... + 2058727.

It is an arithmetic number, because the mean of its divisors is an integer number (12352284).

Almost surely, 2^57643978 is an apocalyptic number.

57643978 is a deficient number, since it is larger than the sum of its proper divisors (41174294).

57643978 is a wasteful number, since it uses less digits than its factorization.

57643978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117436.

The product of its digits is 1270080, while the sum is 49.

The square root of 57643978 is about 7592.3631367315. The cubic root of 57643978 is about 386.2940165517.

The spelling of 57643978 in words is "fifty-seven million, six hundred forty-three thousand, nine hundred seventy-eight".