13281644 has 12 divisors (see below), whose sum is σ = 23469264. Its totient is φ = 6576144.

The previous prime is 13281637. The next prime is 13281647. The reversal of 13281644 is 44618231.

13281644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13281647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15707 + ... + 16530.

It is an arithmetic number, because the mean of its divisors is an integer number (1955772).

Almost surely, 2^13281644 is an apocalyptic number.

It is an amenable number.

13281644 is a deficient number, since it is larger than the sum of its proper divisors (10187620).

13281644 is a wasteful number, since it uses less digits than its factorization.

13281644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32344 (or 32342 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 13281644 is about 3644.3989902314. The cubic root of 13281644 is about 236.8194010690.

Adding to 13281644 its reverse (44618231), we get a palindrome (57899875).

The spelling of 13281644 in words is "thirteen million, two hundred eighty-one thousand, six hundred forty-four".