It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220340.
It is an unprimeable number.
2220340 is an apocalyptic number.
220340 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 220340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241920).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
220340 is a wasteful number, since it uses less digits than its factorization.
220340 is an evil number, because the sum of its binary digits is even.
The square root of 220340 is about 469.4038772741. The cubic root of 220340 is about 60.3991900831.
Adding to 220340 its reverse (43022), we get a palindrome (263362).
The spelling of 220340 in words is "two hundred twenty thousand, three hundred forty", and thus it is an iban number.