56309886 has 24 divisors (see below), whose sum is σ = 122152680. Its totient is φ = 18747216.

The previous prime is 56309881. The next prime is 56309917. The reversal of 56309886 is 68890365.

56309886 is a `hidden beast` number, since 5 + 630 + 9 + 8 + 8 + 6 = 666.

It is a super-2 number, since 2×56309886² = 6341606522665992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56309881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20545 + ... + 23123.

It is an arithmetic number, because the mean of its divisors is an integer number (5089695).

Almost surely, 2^56309886 is an apocalyptic number.

56309886 is an abundant number, since it is smaller than the sum of its proper divisors (65842794).

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

56309886 is a wasteful number, since it uses less digits than its factorization.

56309886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800 (or 3797 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 56309886 is about 7503.9913379481. The cubic root of 56309886 is about 383.2906419165.

The spelling of 56309886 in words is "fifty-six million, three hundred nine thousand, eight hundred eighty-six".