Subtracting from 9828 its sum of digits (27), we obtain a square (9801 = 992).
Multipling 9828 by its sum of digits (27), we get a triangular number (265356 = T728).
9828 is nontrivially palindromic in base 5.
9828 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.
It is a nialpdrome in base 3.
It is a zygodrome in base 3 and base 6.
29828 is an apocalyptic number.
9828 is the 63-rd heptagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 9828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9828 is a wasteful number, since it uses less digits than its factorization.
9828 is an evil number, because the sum of its binary digits is even.
The square root of 9828 is about 99.1362698511. The cubic root of 9828 is about 21.4201109458.
The spelling of 9828 in words is "nine thousand, eight hundred twenty-eight".