320538 has 16 divisors (see below), whose sum is σ = 657216. Its totient is φ = 104160.

The previous prime is 320533. The next prime is 320539. The reversal of 320538 is 835023.

320538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320533) 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, 406 + ... + 897.

It is an arithmetic number, because the mean of its divisors is an integer number (41076).

2³²⁰⁵³⁸ is an apocalyptic number.

320538 is an abundant number, since it is smaller than the sum of its proper divisors (336678).

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

320538 is a wasteful number, since it uses less digits than its factorization.

320538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 320538 is about 566.1607545565. The cubic root of 320538 is about 68.4373483660.

It can be divided in two parts, 320 and 538, that added together give a palindrome (858).

The spelling of 320538 in words is "three hundred twenty thousand, five hundred thirty-eight".