404309904 has 40 divisors (see below), whose sum is σ = 1046129472. Its totient is φ = 134555520.

The previous prime is 404309887. The next prime is 404309921. The reversal of 404309904 is 409903404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404309887) and next prime (404309921).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25357 + ... + 38099.

Almost surely, 2^404309904 is an apocalyptic number.

It is an amenable number.

404309904 is an abundant number, since it is smaller than the sum of its proper divisors (641819568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404309904 is a wasteful number, since it uses less digits than its factorization.

404309904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13415 (or 13409 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 404309904 is about 20107.4589145421. The cubic root of 404309904 is about 739.4431554689.

The spelling of 404309904 in words is "four hundred four million, three hundred nine thousand, nine hundred four".