9889904 has 10 divisors (see below), whose sum is σ = 19161720. Its totient is φ = 4944944.

The previous prime is 9889889. The next prime is 9889909. The reversal of 9889904 is 4099889.

It is a super-2 number, since 2×9889904² = 195620402258432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889909) by changing a digit.

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 as a sum of consecutive naturals, namely, 309044 + ... + 309075.

It is an arithmetic number, because the mean of its divisors is an integer number (1916172).

Almost surely, 2^9889904 is an apocalyptic number.

It is an amenable number.

9889904 is a deficient number, since it is larger than the sum of its proper divisors (9271816).

9889904 is a wasteful number, since it uses less digits than its factorization.

9889904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618127 (or 618121 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 9889904 is about 3144.8217755542. The cubic root of 9889904 is about 214.6499007434.

The spelling of 9889904 in words is "nine million, eight hundred eighty-nine thousand, nine hundred four".