11091328 has 32 divisors (see below), whose sum is σ = 22417560. Its totient is φ = 5465088.

The previous prime is 11091323. The next prime is 11091329. The reversal of 11091328 is 82319011.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11091323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8751 + ... + 9937.

Almost surely, 2^11091328 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 11091328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11208780).

11091328 is an abundant number, since it is smaller than the sum of its proper divisors (11326232).

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

11091328 is an equidigital number, since it uses as much as digits as its factorization.

11091328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 11091328 is about 3330.3645446107. The cubic root of 11091328 is about 223.0118033528.

The spelling of 11091328 in words is "eleven million, ninety-one thousand, three hundred twenty-eight".