13808439 has 12 divisors (see below), whose sum is σ = 20170800. Its totient is φ = 9101664.

The previous prime is 13808401. The next prime is 13808449. The reversal of 13808439 is 93480831.

It is not a de Polignac number, because 13808439 - 2¹⁶ = 13742903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13808449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7819 + ... + 9420.

It is an arithmetic number, because the mean of its divisors is an integer number (1680900).

Almost surely, 2^13808439 is an apocalyptic number.

13808439 is a deficient number, since it is larger than the sum of its proper divisors (6362361).

13808439 is a wasteful number, since it uses less digits than its factorization.

13808439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17334 (or 17331 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 13808439 is about 3715.9708018229. The cubic root of 13808439 is about 239.9099141064.

The spelling of 13808439 in words is "thirteen million, eight hundred eight thousand, four hundred thirty-nine".