400400004404 has 12 divisors (see below), whose sum is σ = 704256861924. Its totient is φ = 199183758144.

The previous prime is 400400004401. The next prime is 400400004469. The reversal of 400400004404 is 404400004004.

It can be written as a sum of positive squares in 2 ways, for example, as 180410863504 + 219989140900 = 424748^2 + 469030^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400400004401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254060129 + ... + 254061704.

It is an arithmetic number, because the mean of its divisors is an integer number (58688071827).

Almost surely, 2^400400004404 is an apocalyptic number.

It is an amenable number.

400400004404 is a deficient number, since it is larger than the sum of its proper divisors (303856857520).

400400004404 is a wasteful number, since it uses less digits than its factorization.

400400004404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508122034 (or 508122032 counting only the distinct ones).

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

Adding to 400400004404 its reverse (404400004004), we get a palindrome (804800008408).

The spelling of 400400004404 in words is "four hundred billion, four hundred million, four thousand, four hundred four".