56851986 has 16 divisors (see below), whose sum is σ = 114535584. Its totient is φ = 18812064.

The previous prime is 56851981. The next prime is 56851997. The reversal of 56851986 is 68915865.

It is not an unprimeable number, because it can be changed into a prime (56851981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33760 + ... + 35403.

It is an arithmetic number, because the mean of its divisors is an integer number (7158474).

Almost surely, 2^56851986 is an apocalyptic number.

56851986 is an abundant number, since it is smaller than the sum of its proper divisors (57683598).

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

56851986 is a wasteful number, since it uses less digits than its factorization.

56851986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69305.

The product of its digits is 518400, while the sum is 48.

The square root of 56851986 is about 7540.0255967735. The cubic root of 56851986 is about 384.5167062151.

The spelling of 56851986 in words is "fifty-six million, eight hundred fifty-one thousand, nine hundred eighty-six".