13678686 has 32 divisors (see below), whose sum is σ = 34740480. Its totient is φ = 3908088.

The previous prime is 13678673. The next prime is 13678699. The reversal of 13678686 is 68687631.

13678686 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 an interprime number because it is at equal distance from previous prime (13678673) and next prime (13678699).

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, 17716 + ... + 18471.

It is an arithmetic number, because the mean of its divisors is an integer number (1085640).

Almost surely, 2^13678686 is an apocalyptic number.

13678686 is an abundant number, since it is smaller than the sum of its proper divisors (21061794).

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

13678686 is a wasteful number, since it uses less digits than its factorization.

13678686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36205 (or 36199 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 13678686 is about 3698.4707650595. The cubic root of 13678686 is about 239.1560986048.

The spelling of 13678686 in words is "thirteen million, six hundred seventy-eight thousand, six hundred eighty-six".