13856805 has 16 divisors (see below), whose sum is σ = 24634560. Its totient is φ = 7390224.

The previous prime is 13856789. The next prime is 13856831. The reversal of 13856805 is 50865831.

It is not a de Polignac number, because 13856805 - 2⁴ = 13856789 is a prime.

It is a super-2 number, since 2×13856805² = 384022089616050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13856805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51187 + ... + 51456.

It is an arithmetic number, because the mean of its divisors is an integer number (1539660).

Almost surely, 2^13856805 is an apocalyptic number.

13856805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13856805 is a deficient number, since it is larger than the sum of its proper divisors (10777755).

13856805 is a wasteful number, since it uses less digits than its factorization.

13856805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102657 (or 102651 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 13856805 is about 3722.4729683370. The cubic root of 13856805 is about 240.1896937783.

The spelling of 13856805 in words is "thirteen million, eight hundred fifty-six thousand, eight hundred five".