320232220 has 96 divisors (see below), whose sum is σ = 874976256. Its totient is φ = 95462400.

The previous prime is 320232173. The next prime is 320232229. The reversal of 320232220 is 22232023.

It is a super-2 number, since 2×320232220² = 205097349452256800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320232194 and 320232203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320232229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30900 + ... + 39940.

It is an arithmetic number, because the mean of its divisors is an integer number (9114336).

Almost surely, 2^320232220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437488128).

320232220 is an abundant number, since it is smaller than the sum of its proper divisors (554744036).

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

320232220 is a wasteful number, since it uses less digits than its factorization.

320232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091 (or 9089 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 320232220 is about 17895.0333891837. The cubic root of 320232220 is about 684.1557930867.

Adding to 320232220 its reverse (22232023), we get a palindrome (342464243).

It can be divided in two parts, 32023 and 2220, that added together give a palindrome (34243).

The spelling of 320232220 in words is "three hundred twenty million, two hundred thirty-two thousand, two hundred twenty".