The square root of 18249984 is 4272.
18249984 is a `hidden beast` number, since 1 + 82 + 499 + 84 = 666.
It is a nude number because it is divisible by every one of its digits.
It is a Duffinian number.
It is an unprimeable number.
Almost surely, 218249984 is an apocalyptic number.
18249984 is the 4272-nd square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 18249984
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18249984 is an frugal number, since it uses more digits than its factorization.
18249984 is an odious number, because the sum of its binary digits is odd.
The cubic root of 18249984 is about 263.2817944677.
The spelling of 18249984 in words is "eighteen million, two hundred forty-nine thousand, nine hundred eighty-four".