9120840 has 96 divisors (see below), whose sum is σ = 29177280. Its totient is φ = 2280448.

The previous prime is 9120829. The next prime is 9120871. The reversal of 9120840 is 480219.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 9120840.

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, 34549 + ... + 34811.

It is an arithmetic number, because the mean of its divisors is an integer number (303930).

Almost surely, 2^9120840 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 9120840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14588640).

9120840 is an abundant number, since it is smaller than the sum of its proper divisors (20056440).

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

9120840 is a wasteful number, since it uses less digits than its factorization.

9120840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 9120840 is about 3020.0728468035. The cubic root of 9120840 is about 208.9351996478.

The spelling of 9120840 in words is "nine million, one hundred twenty thousand, eight hundred forty".