2904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (24).
It is a nialpdrome in base 8 and base 11.
It is a zygodrome in base 11.
It is a congruent number.
2904 is a gapful number since it is divisible by the number (24) 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 2904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3990).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2904 is a wasteful number, since it uses less digits than its factorization.
2904 is an evil number, because the sum of its binary digits is even.
The square root of 2904 is about 53.8887743412. Note that the first 3 decimals coincide. The cubic root of 2904 is about 14.2669849795.
Adding to 2904 its reverse (4092), we get a palindrome (6996).
The spelling of 2904 in words is "two thousand, nine hundred four".