320535220 has 12 divisors (see below), whose sum is σ = 673124004. Its totient is φ = 128214080.

The previous prime is 320535203. The next prime is 320535223. The reversal of 320535220 is 22535023.

It can be written as a sum of positive squares in 2 ways, for example, as 38093584 + 282441636 = 6172^2 + 16806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320535191 and 320535200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320535223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8013361 + ... + 8013400.

It is an arithmetic number, because the mean of its divisors is an integer number (56093667).

Almost surely, 2^320535220 is an apocalyptic number.

It is an amenable number.

320535220 is an abundant number, since it is smaller than the sum of its proper divisors (352588784).

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

320535220 is a wasteful number, since it uses less digits than its factorization.

320535220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16026770 (or 16026768 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 320535220 is about 17903.4974236879. The cubic root of 320535220 is about 684.3715051495.

It can be divided in two parts, 32053 and 5220, that added together give a palindrome (37273).

The spelling of 320535220 in words is "three hundred twenty million, five hundred thirty-five thousand, two hundred twenty".