400636104 has 32 divisors (see below), whose sum is σ = 1092644640. Its totient is φ = 121404800.

The previous prime is 400636091. The next prime is 400636139. The reversal of 400636104 is 401636004.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 758517 + ... + 759044.

It is an arithmetic number, because the mean of its divisors is an integer number (34145145).

Almost surely, 2^400636104 is an apocalyptic number.

400636104 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400636104 is an abundant number, since it is smaller than the sum of its proper divisors (692008536).

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

400636104 is a wasteful number, since it uses less digits than its factorization.

400636104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517581 (or 1517577 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 400636104 is about 20015.8962827049. The cubic root of 400636104 is about 737.1966640696.

The spelling of 400636104 in words is "four hundred million, six hundred thirty-six thousand, one hundred four".