400567664 has 40 divisors (see below), whose sum is σ = 888702048. Its totient is φ = 171336960.

The previous prime is 400567627. The next prime is 400567679. The reversal of 400567664 is 466765004.

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, 59174 + ... + 65594.

Almost surely, 2^400567664 is an apocalyptic number.

It is an amenable number.

400567664 is an abundant number, since it is smaller than the sum of its proper divisors (488134384).

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

400567664 is a wasteful number, since it uses less digits than its factorization.

400567664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993 (or 6987 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 400567664 is about 20014.1865685318. The cubic root of 400567664 is about 737.1546836519.

The spelling of 400567664 in words is "four hundred million, five hundred sixty-seven thousand, six hundred sixty-four".