9115728 has 60 divisors (see below), whose sum is σ = 24685920. Its totient is φ = 2898368.

The previous prime is 9115709. The next prime is 9115739. The reversal of 9115728 is 8275119.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25213 + ... + 25571.

It is an arithmetic number, because the mean of its divisors is an integer number (411432).

Almost surely, 2^9115728 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 9115728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12342960).

9115728 is an abundant number, since it is smaller than the sum of its proper divisors (15570192).

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

9115728 is a wasteful number, since it uses less digits than its factorization.

9115728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 387 counting only the distinct ones).

The product of its digits is 5040, while the sum is 33.

The square root of 9115728 is about 3019.2263909816. The cubic root of 9115728 is about 208.8961580556.

The spelling of 9115728 in words is "nine million, one hundred fifteen thousand, seven hundred twenty-eight".