13643808 has 24 divisors (see below), whose sum is σ = 35815248. Its totient is φ = 4547904.

The previous prime is 13643801. The next prime is 13643827. The reversal of 13643808 is 80834631.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (13643801) 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, 70966 + ... + 71157.

It is an arithmetic number, because the mean of its divisors is an integer number (1492302).

Almost surely, 2^13643808 is an apocalyptic number.

It is an amenable number.

13643808 is an abundant number, since it is smaller than the sum of its proper divisors (22171440).

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

13643808 is a wasteful number, since it uses less digits than its factorization.

13643808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142136 (or 142128 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 13643808 is about 3693.7525634509. The cubic root of 13643808 is about 238.9526583518.

The spelling of 13643808 in words is "thirteen million, six hundred forty-three thousand, eight hundred eight".