320405332 has 12 divisors (see below), whose sum is σ = 603840916. Its totient is φ = 147879360.

The previous prime is 320405317. The next prime is 320405333. The reversal of 320405332 is 233504023.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 304293136 = 4014^2 + 17444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320405333) 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, 3080769 + ... + 3080872.

Almost surely, 2^320405332 is an apocalyptic number.

It is an amenable number.

320405332 is a deficient number, since it is larger than the sum of its proper divisors (283435584).

320405332 is a wasteful number, since it uses less digits than its factorization.

320405332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161658 (or 6161656 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 320405332 is about 17899.8696084636. The cubic root of 320405332 is about 684.2790518088.

Adding to 320405332 its reverse (233504023), we get a palindrome (553909355).

The spelling of 320405332 in words is "three hundred twenty million, four hundred five thousand, three hundred thirty-two".