Subtracting 2128 from its reverse (8212), we obtain a square (6084 = 782).
It is a nude number because it is divisible by every one of its digits.
It is a nialpdrome in base 16.
It is a congruent number.
2128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2480).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2128 is a wasteful number, since it uses less digits than its factorization.
2128 is an odious number, because the sum of its binary digits is odd.
The square root of 2128 is about 46.1302503787. The cubic root of 2128 is about 12.8624551828.
The spelling of 2128 in words is "two thousand, one hundred twenty-eight".