320256 has 54 divisors (see below), whose sum is σ = 930020. Its totient is φ = 105984.

The previous prime is 320239. The next prime is 320267. The reversal of 320256 is 652023.

320256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320256.

It is an unprimeable number.

320256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2235 + ... + 2373.

2³²⁰²⁵⁶ is an apocalyptic number.

320256 is a gapful number since it is divisible by the number (36) 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 320256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (465010).

320256 is an abundant number, since it is smaller than the sum of its proper divisors (609764).

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

320256 is a wasteful number, since it uses less digits than its factorization.

320256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 320256 is about 565.9116538825. The cubic root of 320256 is about 68.4172727487.

Adding to 320256 its reverse (652023), we get a palindrome (972279).

It can be divided in two parts, 320 and 256, that added together give a square (576 = 24²).

The spelling of 320256 in words is "three hundred twenty thousand, two hundred fifty-six".