400371264 has 42 divisors (see below), whose sum is σ = 1147593590. Its totient is φ = 133456896.

The previous prime is 400371253. The next prime is 400371277. The reversal of 400371264 is 462173004.

It can be written as a sum of positive squares in only one way, i.e., 275825664 + 124545600 = 16608^2 + 11160^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 346969 + ... + 348120.

Almost surely, 2^400371264 is an apocalyptic number.

It is an amenable number.

400371264 is an abundant number, since it is smaller than the sum of its proper divisors (747222326).

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

400371264 is a wasteful number, since it uses less digits than its factorization.

400371264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695107 (or 695094 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 400371264 is about 20009.2794472964. The cubic root of 400371264 is about 737.0341872823.

The spelling of 400371264 in words is "four hundred million, three hundred seventy-one thousand, two hundred sixty-four".