320866 has 32 divisors (see below), whose sum is σ = 620928. Its totient is φ = 120960.

The previous prime is 320861. The next prime is 320867. The reversal of 320866 is 668023.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 320866.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320866.

It is not an unprimeable number, because it can be changed into a prime (320861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7441 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (19404).

2³²⁰⁸⁶⁶ is an apocalyptic number.

320866 is a deficient number, since it is larger than the sum of its proper divisors (300062).

320866 is a wasteful number, since it uses less digits than its factorization.

320866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 320866 is about 566.4503508693. The cubic root of 320866 is about 68.4606839227.

Adding to 320866 its reverse (668023), we get a palindrome (988889).

The spelling of 320866 in words is "three hundred twenty thousand, eight hundred sixty-six".