13856823 has 12 divisors (see below), whose sum is σ = 20083440. Its totient is φ = 9206496.

The previous prime is 13856789. The next prime is 13856831. The reversal of 13856823 is 32865831.

It is not a de Polignac number, because 13856823 - 2¹⁴ = 13840439 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13856863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358 + ... + 5276.

It is an arithmetic number, because the mean of its divisors is an integer number (1673620).

Almost surely, 2^13856823 is an apocalyptic number.

13856823 is a deficient number, since it is larger than the sum of its proper divisors (6226617).

13856823 is a wasteful number, since it uses less digits than its factorization.

13856823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5238 (or 5235 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 13856823 is about 3722.4753860838. The cubic root of 13856823 is about 240.1897977804.

The spelling of 13856823 in words is "thirteen million, eight hundred fifty-six thousand, eight hundred twenty-three".