Adding to 2220000 its reverse (222), we get a palindrome (2220222).
Multipling 2220000 by its reverse (222), we get a square (492840000 = 222002).
2220000 divided by its reverse (222) gives a 4-th power (10000 = 104).
It is a tau number, because it is divible by the number of its divisors (120).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
22220000 is an apocalyptic number.
2220000 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 2220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3739428).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2220000 is an equidigital number, since it uses as much as digits as its factorization.
2220000 is an evil number, because the sum of its binary digits is even.
The square root of 2220000 is about 1489.9664425751. The cubic root of 2220000 is about 130.4520750020.
The spelling of 2220000 in words is "two million, two hundred twenty thousand".