400440800408 has 32 divisors (see below), whose sum is σ = 819248074560. Its totient is φ = 181981963680.

The previous prime is 400440800351. The next prime is 400440800411. The reversal of 400440800408 is 804008044004.

It is a happy number.

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, 14510 + ... + 895037.

It is an arithmetic number, because the mean of its divisors is an integer number (25601502330).

Almost surely, 2^400440800408 is an apocalyptic number.

It is an amenable number.

400440800408 is an abundant number, since it is smaller than the sum of its proper divisors (418807274152).

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

400440800408 is a wasteful number, since it uses less digits than its factorization.

400440800408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914567 (or 914563 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The spelling of 400440800408 in words is "four hundred billion, four hundred forty million, eight hundred thousand, four hundred eight".