It is a plaindrome in base 12.
It is a nialpdrome in base 16.
It is a congruent number.
1904 is a gapful number since it is divisible by the number (14) 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 1904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1904 is a wasteful number, since it uses less digits than its factorization.
1904 is an evil number, because the sum of its binary digits is even.
The square root of 1904 is about 43.6348484585. The cubic root of 1904 is about 12.3943088695.
1904 divided by its sum of digits (14) gives a triangular number (136 = T16).
Adding to 1904 its reverse (4091), we get a palindrome (5995).
Subtracting 1904 from its reverse (4091), we obtain a 7-th power (2187 = 37).
The spelling of 1904 in words is "one thousand, nine hundred four".