57159978 has 16 divisors (see below), whose sum is σ = 116027040. Its totient is φ = 18768816.

The previous prime is 57159959. The next prime is 57160009. The reversal of 57159978 is 87995175.

It is a self number, because there is not a number n which added to its sum of digits gives 57159978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70693 + ... + 71496.

It is an arithmetic number, because the mean of its divisors is an integer number (7251690).

Almost surely, 2^57159978 is an apocalyptic number.

57159978 is an abundant number, since it is smaller than the sum of its proper divisors (58867062).

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

57159978 is a wasteful number, since it uses less digits than its factorization.

57159978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142261.

The product of its digits is 793800, while the sum is 51.

The square root of 57159978 is about 7560.4218136292. The cubic root of 57159978 is about 385.2098209750.

The spelling of 57159978 in words is "fifty-seven million, one hundred fifty-nine thousand, nine hundred seventy-eight".