13855685 has 8 divisors (see below), whose sum is σ = 16792056. Its totient is φ = 10974400.

The previous prime is 13855679. The next prime is 13855703. The reversal of 13855685 is 58655831.

It can be written as a sum of positive squares in 4 ways, for example, as 4813636 + 9042049 = 2194^2 + 3007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13855685 - 2¹⁰ = 13854661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13214 + ... + 14223.

It is an arithmetic number, because the mean of its divisors is an integer number (2099007).

Almost surely, 2^13855685 is an apocalyptic number.

It is an amenable number.

13855685 is a deficient number, since it is larger than the sum of its proper divisors (2936371).

13855685 is a wasteful number, since it uses less digits than its factorization.

13855685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27543.

The product of its digits is 144000, while the sum is 41.

The square root of 13855685 is about 3722.3225276701. The cubic root of 13855685 is about 240.1832223561.

The spelling of 13855685 in words is "thirteen million, eight hundred fifty-five thousand, six hundred eighty-five".