It is a happy number.
222690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is an unprimeable number.
222690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2222690 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 222690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288288).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
222690 is a wasteful number, since it uses less digits than its factorization.
222690 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 594.
The square root of 222690 is about 471.9004132230. The cubic root of 222690 is about 60.6131570731.
The spelling of 222690 in words is "two hundred twenty-two thousand, six hundred ninety".