13040320 has 28 divisors (see below), whose sum is σ = 31053024. Its totient is φ = 5216000.

The previous prime is 13040297. The next prime is 13040323. The reversal of 13040320 is 2304031.

13040320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13040320.

It is not an unprimeable number, because it can be changed into a prime (13040323) 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, 20056 + ... + 20695.

Almost surely, 2^13040320 is an apocalyptic number.

13040320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13040320 is an abundant number, since it is smaller than the sum of its proper divisors (18012704).

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

13040320 is an equidigital number, since it uses as much as digits as its factorization.

13040320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40768 (or 40758 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 13040320 is about 3611.1383246838. The cubic root of 13040320 is about 235.3763097170.

Adding to 13040320 its reverse (2304031), we get a palindrome (15344351).

The spelling of 13040320 in words is "thirteen million, forty thousand, three hundred twenty".