999568404 has 48 divisors (see below), whose sum is σ = 2680843200. Its totient is φ = 321699168.

The previous prime is 999568403. The next prime is 999568421. The reversal of 999568404 is 404865999.

999568404 is a `hidden beast` number, since 99 + 95 + 68 + 404 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999568403) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 156442 + ... + 162705.

It is an arithmetic number, because the mean of its divisors is an integer number (55850900).

Almost surely, 2^999568404 is an apocalyptic number.

It is an amenable number.

999568404 is an abundant number, since it is smaller than the sum of its proper divisors (1681274796).

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

999568404 is a wasteful number, since it uses less digits than its factorization.

999568404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319189 (or 319181 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 999568404 is about 31615.9517332628. The cubic root of 999568404 is about 999.8561139645.

The spelling of 999568404 in words is "nine hundred ninety-nine million, five hundred sixty-eight thousand, four hundred four".