57717978 has 8 divisors (see below), whose sum is σ = 115435968. Its totient is φ = 19239324.

The previous prime is 57717967. The next prime is 57717983. The reversal of 57717978 is 87971775.

It is a happy number.

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

57717978 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 57717978.

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, 4809826 + ... + 4809837.

It is an arithmetic number, because the mean of its divisors is an integer number (14429496).

Almost surely, 2^57717978 is an apocalyptic number.

57717978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57717978 is a wasteful number, since it uses less digits than its factorization.

57717978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9619668.

The product of its digits is 864360, while the sum is 51.

The square root of 57717978 is about 7597.2348917221. The cubic root of 57717978 is about 386.4592464953.

The spelling of 57717978 in words is "fifty-seven million, seven hundred seventeen thousand, nine hundred seventy-eight".