It is a congruent number.
It is an unprimeable number.
Almost surely, 218641280 is an apocalyptic number.
18641280 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 18641280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36230400).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18641280 is a wasteful number, since it uses less digits than its factorization.
18641280 is an odious number, because the sum of its binary digits is odd.
The square root of 18641280 is about 4317.5548635773. The cubic root of 18641280 is about 265.1501700180.
The spelling of 18641280 in words is "eighteen million, six hundred forty-one thousand, two hundred eighty".