13801808 has 20 divisors (see below), whose sum is σ = 26802228. Its totient is φ = 6885120.

The previous prime is 13801787. The next prime is 13801849. The reversal of 13801808 is 80810831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8456464 + 5345344 = 2908^2 + 2312^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9788 + ... + 11108.

Almost surely, 2^13801808 is an apocalyptic number.

It is an amenable number.

13801808 is a deficient number, since it is larger than the sum of its proper divisors (13000420).

13801808 is a wasteful number, since it uses less digits than its factorization.

13801808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 13801808 is about 3715.0784648510. The cubic root of 13801808 is about 239.8715052910.

The spelling of 13801808 in words is "thirteen million, eight hundred one thousand, eight hundred eight".