13856864 has 24 divisors (see below), whose sum is σ = 31178448. Its totient is φ = 5938560.

The previous prime is 13856863. The next prime is 13856881. The reversal of 13856864 is 46865831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13856861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30707 + ... + 31154.

It is an arithmetic number, because the mean of its divisors is an integer number (1299102).

Almost surely, 2^13856864 is an apocalyptic number.

13856864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13856864 is an abundant number, since it is smaller than the sum of its proper divisors (17321584).

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

13856864 is an equidigital number, since it uses as much as digits as its factorization.

13856864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61878 (or 61870 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 13856864 is about 3722.4808931679. The cubic root of 13856864 is about 240.1900346739.

The spelling of 13856864 in words is "thirteen million, eight hundred fifty-six thousand, eight hundred sixty-four".