13930686 has 144 divisors (see below), whose sum is σ = 41408640. Its totient is φ = 3278880.

The previous prime is 13930681. The next prime is 13930699. The reversal of 13930686 is 68603931.

It is a happy number.

13930686 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13930686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13930681) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 605671 + ... + 605693.

It is an arithmetic number, because the mean of its divisors is an integer number (287560).

Almost surely, 2^13930686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13930686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20704320).

13930686 is an abundant number, since it is smaller than the sum of its proper divisors (27477954).

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

13930686 is a wasteful number, since it uses less digits than its factorization.

13930686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 13930686 is about 3732.3834208184. The cubic root of 13930686 is about 240.6158143680.

The spelling of 13930686 in words is "thirteen million, nine hundred thirty thousand, six hundred eighty-six".