57178086 has 16 divisors (see below), whose sum is σ = 130692864. Its totient is φ = 16336584.

The previous prime is 57178039. The next prime is 57178091. The reversal of 57178086 is 68087175.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1361383 = 57178086 / (5 + 7 + 1 + 7 + 8 + 0 + 8 + 6).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680650 + ... + 680733.

It is an arithmetic number, because the mean of its divisors is an integer number (8168304).

Almost surely, 2^57178086 is an apocalyptic number.

57178086 is an abundant number, since it is smaller than the sum of its proper divisors (73514778).

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

57178086 is a wasteful number, since it uses less digits than its factorization.

57178086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361395.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 57178086 is about 7561.6192710292. The cubic root of 57178086 is about 385.2504942061.

The spelling of 57178086 in words is "fifty-seven million, one hundred seventy-eight thousand, eighty-six".