400044404400 has 60 divisors (see below), whose sum is σ = 1281475579272. Its totient is φ = 106678507520.

The previous prime is 400044404399. The next prime is 400044404423. The reversal of 400044404400 is 4404440004.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166683969 + ... + 166686368.

Almost surely, 2^400044404400 is an apocalyptic number.

400044404400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400044404400 is an abundant number, since it is smaller than the sum of its proper divisors (881431174872).

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

400044404400 is a wasteful number, since it uses less digits than its factorization.

400044404400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333370358 (or 333370347 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 400044404400 its reverse (4404440004), we get a palindrome (404448844404).

The spelling of 400044404400 in words is "four hundred billion, forty-four million, four hundred four thousand, four hundred".