320402443220 has 48 divisors (see below), whose sum is σ = 687235546368. Its totient is φ = 125420538240.

The previous prime is 320402443213. The next prime is 320402443237. The reversal of 320402443220 is 22344204023.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 320402443220.

It is a congruent number.

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, 16386650 + ... + 16406190.

It is an arithmetic number, because the mean of its divisors is an integer number (14317407216).

Almost surely, 2^320402443220 is an apocalyptic number.

It is an amenable number.

320402443220 is an abundant number, since it is smaller than the sum of its proper divisors (366833103148).

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

320402443220 is a wasteful number, since it uses less digits than its factorization.

320402443220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37040 (or 37038 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 320402443220 its reverse (22344204023), we get a palindrome (342746647243).

The spelling of 320402443220 in words is "three hundred twenty billion, four hundred two million, four hundred forty-three thousand, two hundred twenty".