13808 has 10 divisors (see below), whose sum is σ = 26784. Its totient is φ = 6896.

The previous prime is 13807. The next prime is 13829. The reversal of 13808 is 80831.

It is a self number, because there is not a number n which added to its sum of digits gives 13808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416 + ... + 447.

2¹³⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

13808 is a deficient number, since it is larger than the sum of its proper divisors (12976).

13808 is an equidigital number, since it uses as much as digits as its factorization.

13808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 13808 is about 117.5074465725. The cubic root of 13808 is about 23.9907371662.

The spelling of 13808 in words is "thirteen thousand, eight hundred eight".