13856843 has 32 divisors (see below), whose sum is σ = 18923520. Its totient is φ = 9797760.

The previous prime is 13856839. The next prime is 13856861. The reversal of 13856843 is 34865831.

13856843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13856843 - 2² = 13856839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13856797 and 13856806.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109046 + ... + 109172.

It is an arithmetic number, because the mean of its divisors is an integer number (591360).

Almost surely, 2^13856843 is an apocalyptic number.

13856843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13856843 is a deficient number, since it is larger than the sum of its proper divisors (5066677).

13856843 is a wasteful number, since it uses less digits than its factorization.

13856843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267.

The product of its digits is 69120, while the sum is 38.

The square root of 13856843 is about 3722.4780724673. The cubic root of 13856843 is about 240.1899133383.

It can be divided in two parts, 1385 and 6843, that added together give a palindrome (8228).

The spelling of 13856843 in words is "thirteen million, eight hundred fifty-six thousand, eight hundred forty-three".