It is a happy number.
It is an Ulam number.
1900 is an undulating number in base 7.
It is a plaindrome in base 6, base 11, base 12 and base 14.
It is a nialpdrome in base 13.
1900 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 1900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2170).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1900 is a wasteful number, since it uses less digits than its factorization.
1900 is an odious number, because the sum of its binary digits is odd.
The square root of 1900 is about 43.5889894354. The cubic root of 1900 is about 12.3856232963.
1900 divided by its sum of digits (10) gives a triangular number (190 = T19).
Adding to 1900 its reverse (91), we get a palindrome (1991).
The spelling of 1900 in words is "one thousand, nine hundred".