40856564 has 12 divisors (see below), whose sum is σ = 81713184. Its totient is φ = 17509944.

The previous prime is 40856549. The next prime is 40856591. The reversal of 40856564 is 46565804.

40856564 is an admirable number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729554 + ... + 729609.

It is an arithmetic number, because the mean of its divisors is an integer number (6809432).

Almost surely, 2^40856564 is an apocalyptic number.

It is an amenable number.

40856564 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.

40856564 is a wasteful number, since it uses less digits than its factorization.

40856564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459174 (or 1459172 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 40856564 is about 6391.9139543645. The cubic root of 40856564 is about 344.4191416107.

The spelling of 40856564 in words is "forty million, eight hundred fifty-six thousand, five hundred sixty-four".