13309424 has 20 divisors (see below), whose sum is σ = 27144840. Its totient is φ = 6304320.

The previous prime is 13309423. The next prime is 13309427. The reversal of 13309424 is 42490331.

13309424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13309393 and 13309402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13309421) 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, 21587 + ... + 22194.

It is an arithmetic number, because the mean of its divisors is an integer number (1357242).

Almost surely, 2^13309424 is an apocalyptic number.

It is an amenable number.

13309424 is an abundant number, since it is smaller than the sum of its proper divisors (13835416).

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

13309424 is a wasteful number, since it uses less digits than its factorization.

13309424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43808 (or 43802 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 13309424 is about 3648.2083273848. The cubic root of 13309424 is about 236.9843972471.

Adding to 13309424 its reverse (42490331), we get a palindrome (55799755).

The spelling of 13309424 in words is "thirteen million, three hundred nine thousand, four hundred twenty-four".