40256664 has 32 divisors (see below), whose sum is σ = 115019520. Its totient is φ = 11501856.

The previous prime is 40256659. The next prime is 40256677. The reversal of 40256664 is 46665204.

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, 119644 + ... + 119979.

It is an arithmetic number, because the mean of its divisors is an integer number (3594360).

Almost surely, 2^40256664 is an apocalyptic number.

It is an amenable number.

40256664 is an abundant number, since it is smaller than the sum of its proper divisors (74762856).

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

40256664 is a wasteful number, since it uses less digits than its factorization.

40256664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239639 (or 239635 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 40256664 is about 6344.8139452627. The cubic root of 40256664 is about 342.7251124568.

The spelling of 40256664 in words is "forty million, two hundred fifty-six thousand, six hundred sixty-four".