13979808 has 36 divisors (see below), whose sum is σ = 39755898. Its totient is φ = 4659840.

The previous prime is 13979807. The next prime is 13979809. The reversal of 13979808 is 80897931.

It is an interprime number because it is at equal distance from previous prime (13979807) and next prime (13979809).

It can be written as a sum of positive squares in only one way, i.e., 13927824 + 51984 = 3732^2 + 228^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (13979803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23983 + ... + 24558.

Almost surely, 2^13979808 is an apocalyptic number.

13979808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13979808 is an abundant number, since it is smaller than the sum of its proper divisors (25776090).

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

13979808 is a wasteful number, since it uses less digits than its factorization.

13979808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48557 (or 48546 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 13979808 is about 3738.9581436545. The cubic root of 13979808 is about 240.8983002082.

The spelling of 13979808 in words is "thirteen million, nine hundred seventy-nine thousand, eight hundred eight".