Adding to 220880 its sum of digits (20), we get a square (220900 = 4702).
It is a tau number, because it is divible by the number of its divisors (40).
It is a congruent number.
2220880 is an apocalyptic number.
220880 is a gapful number since it is divisible by the number (20) 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 220880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281232).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
220880 is a wasteful number, since it uses less digits than its factorization.
220880 is an evil number, because the sum of its binary digits is even.
The square root of 220880 is about 469.9787229226. The cubic root of 220880 is about 60.4484910946.
The spelling of 220880 in words is "two hundred twenty thousand, eight hundred eighty".