13539944 has 32 divisors (see below), whose sum is σ = 27851040. Its totient is φ = 6120000.

The previous prime is 13539943. The next prime is 13539949. The reversal of 13539944 is 44993531.

13539944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13539898 and 13539907.

It is not an unprimeable number, because it can be changed into a prime (13539941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21782 + ... + 22394.

It is an arithmetic number, because the mean of its divisors is an integer number (870345).

Almost surely, 2^13539944 is an apocalyptic number.

It is an amenable number.

13539944 is an abundant number, since it is smaller than the sum of its proper divisors (14311096).

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

13539944 is a wasteful number, since it uses less digits than its factorization.

13539944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 877 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 13539944 is about 3679.6662892170. Note that the first 3 decimals coincide. The cubic root of 13539944 is about 238.3447678454.

The spelling of 13539944 in words is "thirteen million, five hundred thirty-nine thousand, nine hundred forty-four".