320220 has 48 divisors (see below), whose sum is σ = 997920. Its totient is φ = 85248.

The previous prime is 320219. The next prime is 320237. The reversal of 320220 is 22023.

It is a Harshad number since it is a multiple of its sum of digits (9).

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 320220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244 + ... + 836.

It is an arithmetic number, because the mean of its divisors is an integer number (20790).

2³²⁰²²⁰ is an apocalyptic number.

320220 is a gapful number since it is divisible by the number (30) 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 320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498960).

320220 is an abundant number, since it is smaller than the sum of its proper divisors (677700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320220 is a wasteful number, since it uses less digits than its factorization.

320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 320220 is about 565.8798459037. The cubic root of 320220 is about 68.4147090558.

Adding to 320220 its reverse (22023), we get a palindrome (342243).

The spelling of 320220 in words is "three hundred twenty thousand, two hundred twenty", and thus it is an iban number.