9911904 has 48 divisors (see below), whose sum is σ = 26191872. Its totient is φ = 3282048.

The previous prime is 9911861. The next prime is 9911917. The reversal of 9911904 is 4091199.

9911904 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21177 + ... + 21639.

It is an arithmetic number, because the mean of its divisors is an integer number (545664).

Almost surely, 2^9911904 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 9911904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13095936).

9911904 is an abundant number, since it is smaller than the sum of its proper divisors (16279968).

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

9911904 is a wasteful number, since it uses less digits than its factorization.

9911904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 9911904 is about 3148.3176459817. The cubic root of 9911904 is about 214.8089451105.

The spelling of 9911904 in words is "nine million, nine hundred eleven thousand, nine hundred four".