13685856 has 48 divisors (see below), whose sum is σ = 36905904. Its totient is φ = 4437504.

The previous prime is 13685809. The next prime is 13685869. The reversal of 13685856 is 65858631.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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, 1626 + ... + 5478.

It is an arithmetic number, because the mean of its divisors is an integer number (768873).

Almost surely, 2^13685856 is an apocalyptic number.

13685856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13685856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18452952).

13685856 is an abundant number, since it is smaller than the sum of its proper divisors (23220048).

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

13685856 is a wasteful number, since it uses less digits than its factorization.

13685856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903 (or 3895 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 13685856 is about 3699.4399576152. The cubic root of 13685856 is about 239.1978777081.

It can be divided in two parts, 13685 and 856, that added together give a palindrome (14541).

The spelling of 13685856 in words is "thirteen million, six hundred eighty-five thousand, eight hundred fifty-six".