320518 has 16 divisors (see below), whose sum is σ = 555984. Its totient is φ = 136960.

The previous prime is 320513. The next prime is 320521. The reversal of 320518 is 815023.

It is a happy number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 320495 and 320504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320513) by changing a digit.

320518 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55 + ... + 802.

It is an arithmetic number, because the mean of its divisors is an integer number (34749).

2³²⁰⁵¹⁸ is an apocalyptic number.

320518 is a deficient number, since it is larger than the sum of its proper divisors (235466).

320518 is a wasteful number, since it uses less digits than its factorization.

320518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 320518 is about 566.1430914530. The cubic root of 320518 is about 68.4359249514.

It can be divided in two parts, 3205 and 18, that added together give a palindrome (3223).

The spelling of 320518 in words is "three hundred twenty thousand, five hundred eighteen".