400320404 has 12 divisors (see below), whose sum is σ = 764248128. Its totient is φ = 181963800.

The previous prime is 400320397. The next prime is 400320461. The reversal of 400320404 is 404023004.

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 3 ways as a sum of consecutive naturals, for example, 4549052 + ... + 4549139.

It is an arithmetic number, because the mean of its divisors is an integer number (63687344).

Almost surely, 2^400320404 is an apocalyptic number.

400320404 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400320404 is a deficient number, since it is larger than the sum of its proper divisors (363927724).

400320404 is a wasteful number, since it uses less digits than its factorization.

400320404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9098206 (or 9098204 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400320404 is about 20008.0084965996. The cubic root of 400320404 is about 737.0029769620.

Adding to 400320404 its reverse (404023004), we get a palindrome (804343408).

The spelling of 400320404 in words is "four hundred million, three hundred twenty thousand, four hundred four".