320723260 has 96 divisors (see below), whose sum is σ = 798400512. Its totient is φ = 106686720.

The previous prime is 320723251. The next prime is 320723261. The reversal of 320723260 is 62327023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320723261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 362779 + ... + 363661.

It is an arithmetic number, because the mean of its divisors is an integer number (8316672).

Almost surely, 2^320723260 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320723260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399200256).

320723260 is an abundant number, since it is smaller than the sum of its proper divisors (477677252).

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

320723260 is a wasteful number, since it uses less digits than its factorization.

320723260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 320723260 is about 17908.7481416206. The cubic root of 320723260 is about 684.5053064222.

The spelling of 320723260 in words is "three hundred twenty million, seven hundred twenty-three thousand, two hundred sixty".