Subtracting 7788 from its reverse (8877), we obtain a square (1089 = 332).
It is a happy number.
It is a plaindrome in base 10.
It is a zygodrome in base 10.
7788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
27788 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 7788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10080).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
7788 is a wasteful number, since it uses less digits than its factorization.
7788 is an evil number, because the sum of its binary digits is even.
The square root of 7788 is about 88.2496458916. The cubic root of 7788 is about 19.8217493890.
The spelling of 7788 in words is "seven thousand, seven hundred eighty-eight".