9931904 has 32 divisors (see below), whose sum is σ = 20432640. Its totient is φ = 4803840.

The previous prime is 9931903. The next prime is 9931907. The reversal of 9931904 is 4091399.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (9931903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2717 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (638520).

Almost surely, 2^9931904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9931904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10216320).

9931904 is an abundant number, since it is smaller than the sum of its proper divisors (10500736).

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

9931904 is a wasteful number, since it uses less digits than its factorization.

9931904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 9931904 is about 3151.4923449058. The cubic root of 9931904 is about 214.9533268076.

The spelling of 9931904 in words is "nine million, nine hundred thirty-one thousand, nine hundred four".