404399564 has 12 divisors (see below), whose sum is σ = 724960488. Its totient is φ = 197268000.

The previous prime is 404399551. The next prime is 404399651. The reversal of 404399564 is 465993404.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1232762 + ... + 1233089.

It is an arithmetic number, because the mean of its divisors is an integer number (60413374).

Almost surely, 2^404399564 is an apocalyptic number.

It is an amenable number.

404399564 is a deficient number, since it is larger than the sum of its proper divisors (320560924).

404399564 is a wasteful number, since it uses less digits than its factorization.

404399564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465896 (or 2465894 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 404399564 is about 20109.6883118561. The cubic root of 404399564 is about 739.4978112107.

The spelling of 404399564 in words is "four hundred four million, three hundred ninety-nine thousand, five hundred sixty-four".