13308520 has 32 divisors (see below), whose sum is σ = 30585600. Its totient is φ = 5209408.

The previous prime is 13308511. The next prime is 13308541. The reversal of 13308520 is 2580331.

It is a junction number, because it is equal to n+sod(n) for n = 13308491 and 13308500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660 + ... + 5419.

It is an arithmetic number, because the mean of its divisors is an integer number (955800).

Almost surely, 2^13308520 is an apocalyptic number.

13308520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13308520 is an abundant number, since it is smaller than the sum of its proper divisors (17277080).

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

13308520 is a wasteful number, since it uses less digits than its factorization.

13308520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137 (or 7133 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13308520 is about 3648.0844288476. The cubic root of 13308520 is about 236.9790316569.

Adding to 13308520 its reverse (2580331), we get a palindrome (15888851).

The spelling of 13308520 in words is "thirteen million, three hundred eight thousand, five hundred twenty".