9899999904 has 24 divisors (see below), whose sum is σ = 25987500000. Its totient is φ = 3299999936.

The previous prime is 9899999897. The next prime is 9899999939. The reversal of 9899999904 is 4099999989.

It is a tau number, because it is divible by the number of its divisors (24).

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 3 ways as a sum of consecutive naturals, for example, 51562404 + ... + 51562595.

It is an arithmetic number, because the mean of its divisors is an integer number (1082812500).

Almost surely, 2^9899999904 is an apocalyptic number.

It is an amenable number.

9899999904 is an abundant number, since it is smaller than the sum of its proper divisors (16087500096).

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

9899999904 is a wasteful number, since it uses less digits than its factorization.

9899999904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103125012 (or 103125004 counting only the distinct ones).

The product of its (nonzero) digits is 153055008, while the sum is 75.

The square root of 9899999904 is about 99498.7432282438. The cubic root of 9899999904 is about 2147.2291620784.

The spelling of 9899999904 in words is "nine billion, eight hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred four".