320532664 has 16 divisors (see below), whose sum is σ = 614976120. Its totient is φ = 156539040.

The previous prime is 320532661. The next prime is 320532673. The reversal of 320532664 is 466235023.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320532661) 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, 465547 + ... + 466234.

Almost surely, 2^320532664 is an apocalyptic number.

It is an amenable number.

320532664 is a deficient number, since it is larger than the sum of its proper divisors (294443456).

320532664 is a wasteful number, since it uses less digits than its factorization.

320532664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931830 (or 931826 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 320532664 is about 17903.4260408448. The cubic root of 320532664 is about 684.3696860481.

Adding to 320532664 its reverse (466235023), we get a palindrome (786767687).

The spelling of 320532664 in words is "three hundred twenty million, five hundred thirty-two thousand, six hundred sixty-four".