13806788 has 24 divisors (see below), whose sum is σ = 25710552. Its totient is φ = 6465024.

The previous prime is 13806769. The next prime is 13806797. The reversal of 13806788 is 88760831.

It can be written as a sum of positive squares in 4 ways, for example, as 5466244 + 8340544 = 2338^2 + 2888^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18470 + ... + 19202.

It is an arithmetic number, because the mean of its divisors is an integer number (1071273).

Almost surely, 2^13806788 is an apocalyptic number.

It is an amenable number.

13806788 is a deficient number, since it is larger than the sum of its proper divisors (11903764).

13806788 is a wasteful number, since it uses less digits than its factorization.

13806788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 13806788 is about 3715.7486459662. The cubic root of 13806788 is about 239.9003521505.

The spelling of 13806788 in words is "thirteen million, eight hundred six thousand, seven hundred eighty-eight".