16604 is an admirable number.
It is a plaindrome in base 9.
It is a nialpdrome in base 13.
It is a zygodrome in base 13.
It is a congruent number.
216604 is an apocalyptic number.
16604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.
It is an amenable number.
16604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
16604 is a wasteful number, since it uses less digits than its factorization.
16604 is an evil number, because the sum of its binary digits is even.
The square root of 16604 is about 128.8565093428. The cubic root of 16604 is about 25.5115928322.
The spelling of 16604 in words is "sixteen thousand, six hundred four".