13686885 has 12 divisors (see below), whose sum is σ = 23724012. Its totient is φ = 7299648.

The previous prime is 13686851. The next prime is 13686889. The reversal of 13686885 is 58868631.

It can be written as a sum of positive squares in 2 ways, for example, as 6380676 + 7306209 = 2526^2 + 2703^2 .

It is not a de Polignac number, because 13686885 - 2⁹ = 13686373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 304153 = 13686885 / (1 + 3 + 6 + 8 + 6 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 13686885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13686889) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 152032 + ... + 152121.

It is an arithmetic number, because the mean of its divisors is an integer number (1977001).

Almost surely, 2^13686885 is an apocalyptic number.

13686885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13686885 is a deficient number, since it is larger than the sum of its proper divisors (10037127).

13686885 is a wasteful number, since it uses less digits than its factorization.

13686885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304164 (or 304161 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 13686885 is about 3699.5790301060. The cubic root of 13686885 is about 239.2038724238.

The spelling of 13686885 in words is "thirteen million, six hundred eighty-six thousand, eight hundred eighty-five".