400404404 has 24 divisors (see below), whose sum is σ = 739586400. Its totient is φ = 189151200.

The previous prime is 400404391. The next prime is 400404449. The reversal of 400404404 is 404404004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21854 + ... + 35754.

It is an arithmetic number, because the mean of its divisors is an integer number (30816100).

Almost surely, 2^400404404 is an apocalyptic number.

It is an amenable number.

400404404 is a deficient number, since it is larger than the sum of its proper divisors (339181996).

400404404 is a wasteful number, since it uses less digits than its factorization.

400404404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14303 (or 14301 counting only the distinct ones).

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

The square root of 400404404 is about 20010.1075459379. The cubic root of 400404404 is about 737.0545222741.

Adding to 400404404 its reverse (404404004), we get a palindrome (804808408).

It can be divided in two parts, 40040 and 4404, that added together give a palindrome (44444).

The spelling of 400404404 in words is "four hundred million, four hundred four thousand, four hundred four".