It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
1100 is an undulating number in base 7.
It is a plaindrome in base 12, base 13, base 14 and base 16.
It is a nialpdrome in base 10 and base 11.
It is a zygodrome in base 10.
1100 is a gapful number since it is divisible by the number (10) 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 1100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1100 is a wasteful number, since it uses less digits than its factorization.
1100 is an evil number, because the sum of its binary digits is even.
The square root of 1100 is about 33.1662479036. The cubic root of 1100 is about 10.3228011546.
Adding to 1100 its reverse (11), we get a palindrome (1111).
Subtracting from 1100 its reverse (11), we obtain a square (1089 = 332).
Multiplying 1100 by its reverse (11), we get a square (12100 = 1102).
1100 divided by its reverse (11) gives a square (100 = 102).
The spelling of 1100 in words is "one thousand, one hundred", and thus it is an iban number.