320330144 has 12 divisors (see below), whose sum is σ = 630650034. Its totient is φ = 160165056.

The previous prime is 320330141. The next prime is 320330159. The reversal of 320330144 is 441033023.

320330144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 236790544 + 83539600 = 15388^2 + 9140^2 .

It is a super-2 number, since 2×320330144² = 205222802310121472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320330141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005127 + ... + 5005190.

Almost surely, 2^320330144 is an apocalyptic number.

It is an amenable number.

320330144 is a deficient number, since it is larger than the sum of its proper divisors (310319890).

320330144 is a wasteful number, since it uses less digits than its factorization.

320330144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010327 (or 10010319 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 320330144 is about 17897.7692464731. The cubic root of 320330144 is about 684.2255221146.

Adding to 320330144 its reverse (441033023), we get a palindrome (761363167).

The spelling of 320330144 in words is "three hundred twenty million, three hundred thirty thousand, one hundred forty-four".