13668544 has 42 divisors (see below), whose sum is σ = 28851860. Its totient is φ = 6423552.

The previous prime is 13668521. The next prime is 13668547. The reversal of 13668544 is 44586631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13668547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18127 + ... + 18865.

Almost surely, 2^13668544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13668544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14425930).

13668544 is an abundant number, since it is smaller than the sum of its proper divisors (15183316).

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

13668544 is an equidigital number, since it uses as much as digits as its factorization.

13668544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785 (or 758 counting only the distinct ones).

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

The square root of 13668544 is about 3697.0994035865. The cubic root of 13668544 is about 239.0969769206.

The spelling of 13668544 in words is "thirteen million, six hundred sixty-eight thousand, five hundred forty-four".