11391328 has 48 divisors (see below), whose sum is σ = 24449040. Its totient is φ = 5193216.

The previous prime is 11391293. The next prime is 11391329. The reversal of 11391328 is 82319311.

It is a junction number, because it is equal to n+sod(n) for n = 11391296 and 11391305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57726 + ... + 57922.

It is an arithmetic number, because the mean of its divisors is an integer number (509355).

Almost surely, 2^11391328 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 11391328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12224520).

11391328 is an abundant number, since it is smaller than the sum of its proper divisors (13057712).

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

11391328 is a wasteful number, since it uses less digits than its factorization.

11391328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 351 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 11391328 is about 3375.1041465413. The cubic root of 11391328 is about 225.0046287114.

The spelling of 11391328 in words is "eleven million, three hundred ninety-one thousand, three hundred twenty-eight".