11158728 has 64 divisors (see below), whose sum is σ = 32194560. Its totient is φ = 3157056.

The previous prime is 11158699. The next prime is 11158751. The reversal of 11158728 is 82785111.

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, 21075 + ... + 21597.

It is an arithmetic number, because the mean of its divisors is an integer number (503040).

Almost surely, 2^11158728 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 11158728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16097280).

11158728 is an abundant number, since it is smaller than the sum of its proper divisors (21035832).

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

11158728 is a wasteful number, since it uses less digits than its factorization.

11158728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 662 counting only the distinct ones).

The product of its digits is 4480, while the sum is 33.

The square root of 11158728 is about 3340.4682306527. The cubic root of 11158728 is about 223.4626255638.

The spelling of 11158728 in words is "eleven million, one hundred fifty-eight thousand, seven hundred twenty-eight".