400044404000 has 96 divisors (see below), whose sum is σ = 997580054016. Its totient is φ = 157629331200.

The previous prime is 400044403973. The next prime is 400044404083. The reversal of 400044404000 is 404440004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478352 + ... + 1014351.

It is an arithmetic number, because the mean of its divisors is an integer number (10391458896).

Almost surely, 2^400044404000 is an apocalyptic number.

400044404000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400044404000 is an abundant number, since it is smaller than the sum of its proper divisors (597535650016).

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

400044404000 is a wasteful number, since it uses less digits than its factorization.

400044404000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492795 (or 1492777 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 400044404000 its reverse (404440004), we get a palindrome (400448844004).

The spelling of 400044404000 in words is "four hundred billion, forty-four million, four hundred four thousand".