400044444080 has 40 divisors (see below), whose sum is σ = 939312295344. Its totient is φ = 158433440000.

The previous prime is 400044444073. The next prime is 400044444089. The reversal of 400044444080 is 80444440004.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (400044444089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24747146 + ... + 24763305.

Almost surely, 2^400044444080 is an apocalyptic number.

400044444080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400044444080 is an abundant number, since it is smaller than the sum of its proper divisors (539267851264).

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

400044444080 is a wasteful number, since it uses less digits than its factorization.

400044444080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49510565 (or 49510559 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 400044444080 its reverse (80444440004), we get a palindrome (480488884084).

The spelling of 400044444080 in words is "four hundred billion, forty-four million, four hundred forty-four thousand, eighty".