9115920 has 120 divisors (see below), whose sum is σ = 33426432. Its totient is φ = 2208000.

The previous prime is 9115919. The next prime is 9115943. The reversal of 9115920 is 295119.

It is a happy number.

9115920 is digitally balanced in base 5, because in such base 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 (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7345 + ... + 8495.

Almost surely, 2^9115920 is an apocalyptic number.

9115920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9115920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16713216).

9115920 is an abundant number, since it is smaller than the sum of its proper divisors (24310512).

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

9115920 is a wasteful number, since it uses less digits than its factorization.

9115920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 9115920 is about 3019.2581870387. The cubic root of 9115920 is about 208.8976246703.

The spelling of 9115920 in words is "nine million, one hundred fifteen thousand, nine hundred twenty".