13057686 has 20 divisors (see below), whose sum is σ = 29259252. Its totient is φ = 4352508.

The previous prime is 13057679. The next prime is 13057691. The reversal of 13057686 is 68675031.

13057686 is a `hidden beast` number, since 1 + 3 + 0 + 576 + 86 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13057686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40140 + ... + 40463.

Almost surely, 2^13057686 is an apocalyptic number.

13057686 is an abundant number, since it is smaller than the sum of its proper divisors (16201566).

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

13057686 is an equidigital number, since it uses as much as digits as its factorization.

13057686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80617 (or 80608 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 13057686 is about 3613.5420296435. The cubic root of 13057686 is about 235.4807481524.

The spelling of 13057686 in words is "thirteen million, fifty-seven thousand, six hundred eighty-six".