13856449 has 4 divisors (see below), whose sum is σ = 14178736. Its totient is φ = 13534164.

The previous prime is 13856441. The next prime is 13856509. The reversal of 13856449 is 94465831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13856449 - 2³ = 13856441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13856441) 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 3 ways as a sum of consecutive naturals, for example, 161079 + ... + 161164.

It is an arithmetic number, because the mean of its divisors is an integer number (3544684).

Almost surely, 2^13856449 is an apocalyptic number.

It is an amenable number.

13856449 is a deficient number, since it is larger than the sum of its proper divisors (322287).

13856449 is an equidigital number, since it uses as much as digits as its factorization.

13856449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322286.

The product of its digits is 103680, while the sum is 40.

The square root of 13856449 is about 3722.4251503556. The cubic root of 13856449 is about 240.1876368283.

The spelling of 13856449 in words is "thirteen million, eight hundred fifty-six thousand, four hundred forty-nine".