404400844404 has 48 divisors (see below), whose sum is σ = 1048480957440. Its totient is φ = 134795868480.

The previous prime is 404400844391. The next prime is 404400844469. The reversal of 404400844404 is 404448004404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6209032 + ... + 6273824.

It is an arithmetic number, because the mean of its divisors is an integer number (21843353280).

Almost surely, 2^404400844404 is an apocalyptic number.

It is an amenable number.

404400844404 is an abundant number, since it is smaller than the sum of its proper divisors (644080113036).

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

404400844404 is a wasteful number, since it uses less digits than its factorization.

404400844404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122597 (or 122589 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 36.

Adding to 404400844404 its reverse (404448004404), we get a palindrome (808848848808).

The spelling of 404400844404 in words is "four hundred four billion, four hundred million, eight hundred forty-four thousand, four hundred four".