400556136 has 16 divisors (see below), whose sum is σ = 1001390400. Its totient is φ = 133518704.

The previous prime is 400556111. The next prime is 400556153. The reversal of 400556136 is 631655004.

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, 8344896 + ... + 8344943.

It is an arithmetic number, because the mean of its divisors is an integer number (62586900).

Almost surely, 2^400556136 is an apocalyptic number.

It is an amenable number.

400556136 is an abundant number, since it is smaller than the sum of its proper divisors (600834264).

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

400556136 is a wasteful number, since it uses less digits than its factorization.

400556136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16689848 (or 16689844 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 400556136 is about 20013.8985707433. The cubic root of 400556136 is about 737.1476120205.

The spelling of 400556136 in words is "four hundred million, five hundred fifty-six thousand, one hundred thirty-six".