400044404440 has 64 divisors (see below), whose sum is σ = 904160880000. Its totient is φ = 159296256000.

The previous prime is 400044404429. The next prime is 400044404453. The reversal of 400044404440 is 44404440004.

It is a junction number, because it is equal to n+sod(n) for n = 400044404399 and 400044404408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44439940 + ... + 44448940.

It is an arithmetic number, because the mean of its divisors is an integer number (14127513750).

Almost surely, 2^400044404440 is an apocalyptic number.

400044404440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400044404440 is an abundant number, since it is smaller than the sum of its proper divisors (504116475560).

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

400044404440 is a wasteful number, since it uses less digits than its factorization.

400044404440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13900 (or 13896 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400044404440 its reverse (44404440004), we get a palindrome (444448844444).

It can be divided in two parts, 40004 and 4404440, that added together give a palindrome (4444444).

The spelling of 400044404440 in words is "four hundred billion, forty-four million, four hundred four thousand, four hundred forty".