9919904 has 24 divisors (see below), whose sum is σ = 19901700. Its totient is φ = 4865536.

The previous prime is 9919883. The next prime is 9919933. The reversal of 9919904 is 4099199.

9919904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9909904 + 10000 = 3148^2 + 100^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229 + ... + 4620.

Almost surely, 2^9919904 is an apocalyptic number.

It is an amenable number.

9919904 is an abundant number, since it is smaller than the sum of its proper divisors (9981796).

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

9919904 is a wasteful number, since it uses less digits than its factorization.

9919904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912 (or 5904 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 9919904 is about 3149.5879095526. The cubic root of 9919904 is about 214.8667210749.

The spelling of 9919904 in words is "nine million, nine hundred nineteen thousand, nine hundred four".