13644744 has 64 divisors (see below), whose sum is σ = 36858240. Its totient is φ = 4193280.

The previous prime is 13644739. The next prime is 13644769. The reversal of 13644744 is 44744631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21309 + ... + 21939.

It is an arithmetic number, because the mean of its divisors is an integer number (575910).

Almost surely, 2^13644744 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 13644744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18429120).

13644744 is an abundant number, since it is smaller than the sum of its proper divisors (23213496).

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

13644744 is a wasteful number, since it uses less digits than its factorization.

13644744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 706 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 13644744 is about 3693.8792616977. The cubic root of 13644744 is about 238.9581224806.

The spelling of 13644744 in words is "thirteen million, six hundred forty-four thousand, seven hundred forty-four".