400900836 has 48 divisors (see below), whose sum is σ = 1125340160. Its totient is φ = 108514080.

The previous prime is 400900831. The next prime is 400900853. The reversal of 400900836 is 638009004.

It is not an unprimeable number, because it can be changed into a prime (400900831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124000 + ... + 127191.

Almost surely, 2^400900836 is an apocalyptic number.

It is an amenable number.

400900836 is an abundant number, since it is smaller than the sum of its proper divisors (724439324).

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

400900836 is a wasteful number, since it uses less digits than its factorization.

400900836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251224 (or 251222 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 400900836 is about 20022.5082344845. The cubic root of 400900836 is about 737.3590030561.

The spelling of 400900836 in words is "four hundred million, nine hundred thousand, eight hundred thirty-six".