320818 has 4 divisors (see below), whose sum is σ = 481230. Its totient is φ = 160408.

The previous prime is 320791. The next prime is 320821. The reversal of 320818 is 818023.

320818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818023 = 17 ⋅48119.

It can be written as a sum of positive squares in only one way, i.e., 299209 + 21609 = 547^2 + 147^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80203 + ... + 80206.

2³²⁰⁸¹⁸ is an apocalyptic number.

320818 is a deficient number, since it is larger than the sum of its proper divisors (160412).

320818 is a wasteful number, since it uses less digits than its factorization.

320818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160411.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 320818 is about 566.4079801698. The cubic root of 320818 is about 68.4572699568.

The spelling of 320818 in words is "three hundred twenty thousand, eight hundred eighteen".