9090240 has 112 divisors (see below), whose sum is σ = 30614112. Its totient is φ = 2277376.

The previous prime is 9090229. The next prime is 9090241. The reversal of 9090240 is 420909.

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 9090240.

It is not an unprimeable number, because it can be changed into a prime (9090241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16042 + ... + 16598.

Almost surely, 2^9090240 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 9090240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15307056).

9090240 is an abundant number, since it is smaller than the sum of its proper divisors (21523872).

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

9090240 is a wasteful number, since it uses less digits than its factorization.

9090240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 9090240 is about 3015.0024875612. The cubic root of 9090240 is about 208.7012818530.

The spelling of 9090240 in words is "nine million, ninety thousand, two hundred forty".