400539064 has 16 divisors (see below), whose sum is σ = 756415800. Its totient is φ = 198828192.

The previous prime is 400539059. The next prime is 400539079. The reversal of 400539064 is 460935004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178987 + ... + 181210.

Almost surely, 2^400539064 is an apocalyptic number.

It is an amenable number.

400539064 is a deficient number, since it is larger than the sum of its proper divisors (355876736).

400539064 is a wasteful number, since it uses less digits than its factorization.

400539064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360342 (or 360338 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 400539064 is about 20013.4720625882. The cubic root of 400539064 is about 737.1371392788.

The spelling of 400539064 in words is "four hundred million, five hundred thirty-nine thousand, sixty-four".