9915072 has 56 divisors (see below), whose sum is σ = 26523696. Its totient is φ = 3268608.

The previous prime is 9915043. The next prime is 9915083. The reversal of 9915072 is 2705199.

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, 21468 + ... + 21924.

Almost surely, 2^9915072 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 9915072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13261848).

9915072 is an abundant number, since it is smaller than the sum of its proper divisors (16608624).

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

9915072 is a wasteful number, since it uses less digits than its factorization.

9915072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 9915072 is about 3148.8207316391. The cubic root of 9915072 is about 214.8318281089.

It can be divided in two parts, 99 and 15072, that multiplied together give a triangular number (1492128 = T₁₇₂₇).

The spelling of 9915072 in words is "nine million, nine hundred fifteen thousand, seventy-two".