320530 has 32 divisors (see below), whose sum is σ = 696960. Its totient is φ = 103680.

The previous prime is 320521. The next prime is 320533. The reversal of 320530 is 35023.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 320530.

It is not an unprimeable number, because it can be changed into a prime (320533) by changing a digit.

320530 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 15 ways as a sum of consecutive naturals, for example, 1210 + ... + 1450.

It is an arithmetic number, because the mean of its divisors is an integer number (21780).

2³²⁰⁵³⁰ is an apocalyptic number.

320530 is an abundant number, since it is smaller than the sum of its proper divisors (376430).

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

320530 is a wasteful number, since it uses less digits than its factorization.

320530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274.

The product of its (nonzero) digits is 90, while the sum is 13.

The square root of 320530 is about 566.1536893812. The cubic root of 320530 is about 68.4367790073.

Adding to 320530 its reverse (35023), we get a palindrome (355553).

The spelling of 320530 in words is "three hundred twenty thousand, five hundred thirty".