It is a happy number.
It is an Ulam number.
It is a congruent number.
27884 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 7884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
7884 is a wasteful number, since it uses less digits than its factorization.
7884 is an evil number, because the sum of its binary digits is even.
The square root of 7884 is about 88.7918915217. The cubic root of 7884 is about 19.9028623106.
7884 divided by its sum of digits (27) gives a palindrome (292).
The spelling of 7884 in words is "seven thousand, eight hundred eighty-four".