13856644 has 24 divisors (see below), whose sum is σ = 24893568. Its totient is φ = 6746880.

The previous prime is 13856639. The next prime is 13856651. The reversal of 13856644 is 44665831.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27297 + ... + 27799.

It is an arithmetic number, because the mean of its divisors is an integer number (1037232).

Almost surely, 2^13856644 is an apocalyptic number.

It is an amenable number.

13856644 is a deficient number, since it is larger than the sum of its proper divisors (11036924).

13856644 is a wasteful number, since it uses less digits than its factorization.

13856644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 673 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 13856644 is about 3722.4513428653. The cubic root of 13856644 is about 240.1887635328.

The spelling of 13856644 in words is "thirteen million, eight hundred fifty-six thousand, six hundred forty-four".