9118728 has 48 divisors (see below), whose sum is σ = 25307100. Its totient is φ = 2964480.

The previous prime is 9118721. The next prime is 9118751. The reversal of 9118728 is 8278119.

It can be written as a sum of positive squares in 2 ways, for example, as 9108324 + 10404 = 3018^2 + 102^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 9118692 and 9118701.

It is not an unprimeable number, because it can be changed into a prime (9118721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1408 + ... + 4496.

Almost surely, 2^9118728 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 9118728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12653550).

9118728 is an abundant number, since it is smaller than the sum of its proper divisors (16188372).

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

9118728 is a wasteful number, since it uses less digits than its factorization.

9118728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142 (or 3135 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 9118728 is about 3019.7231661197. The cubic root of 9118728 is about 208.9190715570.

The spelling of 9118728 in words is "nine million, one hundred eighteen thousand, seven hundred twenty-eight".