320306 has 16 divisors (see below), whose sum is σ = 556416. Its totient is φ = 135456.

The previous prime is 320303. The next prime is 320317. The reversal of 320306 is 603023.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320306.

It is not an unprimeable number, because it can be changed into a prime (320303) 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, 1835 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (34776).

2³²⁰³⁰⁶ is an apocalyptic number.

320306 is a deficient number, since it is larger than the sum of its proper divisors (236110).

320306 is a wasteful number, since it uses less digits than its factorization.

320306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 320306 is about 565.9558286651. The cubic root of 320306 is about 68.4208331146.

Adding to 320306 its reverse (603023), we get a palindrome (923329).

It can be divided in two parts, 320 and 306, that added together give a palindrome (626).

The spelling of 320306 in words is "three hundred twenty thousand, three hundred six".