320340 has 48 divisors (see below), whose sum is σ = 947520. Its totient is φ = 80640.

The previous prime is 320339. The next prime is 320377. The reversal of 320340 is 43023.

320340 = T₁₁₅ + T₁₁₆ + ... + T₁₅₀.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000 + ... + 1280.

It is an arithmetic number, because the mean of its divisors is an integer number (19740).

2³²⁰³⁴⁰ is an apocalyptic number.

320340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473760).

320340 is an abundant number, since it is smaller than the sum of its proper divisors (627180).

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

320340 is a wasteful number, since it uses less digits than its factorization.

320340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 320340 is about 565.9858655479. The cubic root of 320340 is about 68.4232539518.

Adding to 320340 its reverse (43023), we get a palindrome (363363).

The spelling of 320340 in words is "three hundred twenty thousand, three hundred forty", and thus it is an iban number.