9904009904 has 40 divisors (see below), whose sum is σ = 19412276880. Its totient is φ = 4894560000.

The previous prime is 9904009877. The next prime is 9904009909. The reversal of 9904009904 is 4099004099.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9904009909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995354 + ... + 1005254.

It is an arithmetic number, because the mean of its divisors is an integer number (485306922).

Almost surely, 2^9904009904 is an apocalyptic number.

It is an amenable number.

9904009904 is a deficient number, since it is larger than the sum of its proper divisors (9508266976).

9904009904 is a wasteful number, since it uses less digits than its factorization.

9904009904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10629 (or 10623 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 9904009904 is about 99518.8921964066. The cubic root of 9904009904 is about 2147.5190350325.

It can be divided in two parts, 990400 and 9904, that multiplied together give a square (9808921600 = 99040²).

The spelling of 9904009904 in words is "nine billion, nine hundred four million, nine thousand, nine hundred four".