9915240 has 64 divisors (see below), whose sum is σ = 30326400. Its totient is φ = 2592512.

The previous prime is 9915229. The next prime is 9915281. The reversal of 9915240 is 425199.

It is a happy number.

9915240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 9915198 and 9915207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5581 + ... + 7139.

It is an arithmetic number, because the mean of its divisors is an integer number (473850).

Almost surely, 2^9915240 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 9915240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15163200).

9915240 is an abundant number, since it is smaller than the sum of its proper divisors (20411160).

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

9915240 is a wasteful number, since it uses less digits than its factorization.

9915240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 9915240 is about 3148.8474081797. The cubic root of 9915240 is about 214.8330414652.

The spelling of 9915240 in words is "nine million, nine hundred fifteen thousand, two hundred forty".