13309320 has 64 divisors (see below), whose sum is σ = 40201920. Its totient is φ = 3524864.

The previous prime is 13309301. The next prime is 13309337. The reversal of 13309320 is 2390331.

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, 23359 + ... + 23921.

It is an arithmetic number, because the mean of its divisors is an integer number (628155).

Almost surely, 2^13309320 is an apocalyptic number.

13309320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13309320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20100960).

13309320 is an abundant number, since it is smaller than the sum of its proper divisors (26892600).

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

13309320 is a wasteful number, since it uses less digits than its factorization.

13309320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 13309320 is about 3648.1940737850. The cubic root of 13309320 is about 236.9837799792.

Adding to 13309320 its reverse (2390331), we get a palindrome (15699651).

The spelling of 13309320 in words is "thirteen million, three hundred nine thousand, three hundred twenty".