320243660 has 24 divisors (see below), whose sum is σ = 733649616. Its totient is φ = 116452160.

The previous prime is 320243659. The next prime is 320243663. The reversal of 320243660 is 66342023.

It is not an unprimeable number, because it can be changed into a prime (320243663) 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, 727607 + ... + 728046.

It is an arithmetic number, because the mean of its divisors is an integer number (30568734).

Almost surely, 2^320243660 is an apocalyptic number.

It is an amenable number.

320243660 is an abundant number, since it is smaller than the sum of its proper divisors (413405956).

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

320243660 is a wasteful number, since it uses less digits than its factorization.

320243660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455673 (or 1455671 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 320243660 is about 17895.3530280908. The cubic root of 320243660 is about 684.1639399341.

Adding to 320243660 its reverse (66342023), we get a palindrome (386585683).

The spelling of 320243660 in words is "three hundred twenty million, two hundred forty-three thousand, six hundred sixty".