13813686 has 32 divisors (see below), whose sum is σ = 31759200. Its totient is φ = 4445280.

The previous prime is 13813651. The next prime is 13813699. The reversal of 13813686 is 68631831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13813686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2845 + ... + 5976.

It is an arithmetic number, because the mean of its divisors is an integer number (992475).

Almost surely, 2^13813686 is an apocalyptic number.

13813686 is an abundant number, since it is smaller than the sum of its proper divisors (17945514).

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

13813686 is a wasteful number, since it uses less digits than its factorization.

13813686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861 (or 8855 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 13813686 is about 3716.6767413914. The cubic root of 13813686 is about 239.9402976497.

It can be divided in two parts, 138 and 13686, that added together give a cube (13824 = 24³).

The spelling of 13813686 in words is "thirteen million, eight hundred thirteen thousand, six hundred eighty-six".