400807636404 has 24 divisors (see below), whose sum is σ = 1068820363968. Its totient is φ = 114516467520.

The previous prime is 400807636393. The next prime is 400807636499. The reversal of 400807636404 is 404636708004.

It is a super-2 number, since 2×400807636404² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 2385759657 + ... + 2385759824.

It is an arithmetic number, because the mean of its divisors is an integer number (44534181832).

Almost surely, 2^400807636404 is an apocalyptic number.

It is an amenable number.

400807636404 is an abundant number, since it is smaller than the sum of its proper divisors (668012727564).

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

400807636404 is a wasteful number, since it uses less digits than its factorization.

400807636404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771519495 (or 4771519493 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 400807636404 in words is "four hundred billion, eight hundred seven million, six hundred thirty-six thousand, four hundred four".