400404404044 has 24 divisors (see below), whose sum is σ = 706046390000. Its totient is φ = 198682303680.

The previous prime is 400404404027. The next prime is 400404404047. The reversal of 400404404044 is 440404404004.

It is not an unprimeable number, because it can be changed into a prime (400404404047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385119 + ... + 974230.

Almost surely, 2^400404404044 is an apocalyptic number.

It is an amenable number.

400404404044 is a deficient number, since it is larger than the sum of its proper divisors (305641985956).

400404404044 is a wasteful number, since it uses less digits than its factorization.

400404404044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359913 (or 1359911 counting only the distinct ones).

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

Adding to 400404404044 its reverse (440404404004), we get a palindrome (840808808048).

The spelling of 400404404044 in words is "four hundred billion, four hundred four million, four hundred four thousand, forty-four".