11391320 has 16 divisors (see below), whose sum is σ = 25630560. Its totient is φ = 4556512.

The previous prime is 11391293. The next prime is 11391329. The reversal of 11391320 is 2319311.

11391320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11391292 and 11391301.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142352 + ... + 142431.

It is an arithmetic number, because the mean of its divisors is an integer number (1601910).

Almost surely, 2^11391320 is an apocalyptic number.

11391320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11391320 is an abundant number, since it is smaller than the sum of its proper divisors (14239240).

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

11391320 is a wasteful number, since it uses less digits than its factorization.

11391320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284794 (or 284790 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 11391320 is about 3375.1029613924. The cubic root of 11391320 is about 225.0045760386.

It can be divided in two parts, 11391 and 320, that added together give a palindrome (11711).

The spelling of 11391320 in words is "eleven million, three hundred ninety-one thousand, three hundred twenty".