320423330 has 16 divisors (see below), whose sum is σ = 592350840. Its totient is φ = 124705152.

The previous prime is 320423273. The next prime is 320423339. The reversal of 320423330 is 33324023.

It can be written as a sum of positive squares in 4 ways, for example, as 307756849 + 12666481 = 17543^2 + 3559^2 .

It is a super-2 number, since 2×320423330² = 205342220816577800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320423339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432635 + ... + 433374.

Almost surely, 2^320423330 is an apocalyptic number.

320423330 is a deficient number, since it is larger than the sum of its proper divisors (271927510).

320423330 is a wasteful number, since it uses less digits than its factorization.

320423330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866053.

The product of its (nonzero) digits is 1296, while the sum is 20.

The square root of 320423330 is about 17900.3723424961. The cubic root of 320423330 is about 684.2918641464.

Adding to 320423330 its reverse (33324023), we get a palindrome (353747353).

The spelling of 320423330 in words is "three hundred twenty million, four hundred twenty-three thousand, three hundred thirty".