400840404400 has 30 divisors (see below), whose sum is σ = 963019072532. Its totient is φ = 160336161600.

The previous prime is 400840404397. The next prime is 400840404443. The reversal of 400840404400 is 4404048004.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 501050106 + ... + 501050905.

Almost surely, 2^400840404400 is an apocalyptic number.

400840404400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400840404400 is an abundant number, since it is smaller than the sum of its proper divisors (562178668132).

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

400840404400 is a wasteful number, since it uses less digits than its factorization.

400840404400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002101029 (or 1002101018 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The spelling of 400840404400 in words is "four hundred billion, eight hundred forty million, four hundred four thousand, four hundred".