400725808 has 40 divisors (see below), whose sum is σ = 934027520. Its totient is φ = 162699840.

The previous prime is 400725797. The next prime is 400725823. The reversal of 400725808 is 808527004.

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, 92028 + ... + 96283.

It is an arithmetic number, because the mean of its divisors is an integer number (23350688).

Almost surely, 2^400725808 is an apocalyptic number.

It is an amenable number.

400725808 is an abundant number, since it is smaller than the sum of its proper divisors (533301712).

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

400725808 is a wasteful number, since it uses less digits than its factorization.

400725808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188345 (or 188339 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 400725808 is about 20018.1369762523. The cubic root of 400725808 is about 737.2516803749.

The spelling of 400725808 in words is "four hundred million, seven hundred twenty-five thousand, eight hundred eight".