13680786 has 32 divisors (see below), whose sum is σ = 31408128. Its totient is φ = 3891600.

The previous prime is 13680773. The next prime is 13680809. The reversal of 13680786 is 68708631.

It is a Curzon 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, 11311 + ... + 12461.

It is an arithmetic number, because the mean of its divisors is an integer number (981504).

Almost surely, 2^13680786 is an apocalyptic number.

13680786 is an abundant number, since it is smaller than the sum of its proper divisors (17727342).

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

13680786 is a wasteful number, since it uses less digits than its factorization.

13680786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 13680786 is about 3698.7546552860. The cubic root of 13680786 is about 239.1683366738.

The spelling of 13680786 in words is "thirteen million, six hundred eighty thousand, seven hundred eighty-six".