13881844 has 12 divisors (see below), whose sum is σ = 24534468. Its totient is φ = 6872000.

The previous prime is 13881839. The next prime is 13881853. The reversal of 13881844 is 44818831.

It can be written as a sum of positive squares in 2 ways, for example, as 12531600 + 1350244 = 3540^2 + 1162^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16777 + ... + 17584.

It is an arithmetic number, because the mean of its divisors is an integer number (2044539).

Almost surely, 2^13881844 is an apocalyptic number.

It is an amenable number.

13881844 is a deficient number, since it is larger than the sum of its proper divisors (10652624).

13881844 is a wasteful number, since it uses less digits than its factorization.

13881844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34466 (or 34464 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 13881844 is about 3725.8346715870. The cubic root of 13881844 is about 240.3342795591.

The spelling of 13881844 in words is "thirteen million, eight hundred eighty-one thousand, eight hundred forty-four".