It is a nude number because it is divisible by every one of its digits.
It is a nialpdrome in base 6 and base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 7644.
It is a congruent number.
27644 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 7644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11172).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
7644 is a wasteful number, since it uses less digits than its factorization.
7644 is an odious number, because the sum of its binary digits is odd.
The square root of 7644 is about 87.4299719776. The cubic root of 7644 is about 19.6988206497.
The spelling of 7644 in words is "seven thousand, six hundred forty-four".