320456 has 16 divisors (see below), whose sum is σ = 616140. Its totient is φ = 156160.

The previous prime is 320449. The next prime is 320471. The reversal of 320456 is 654023.

It can be written as a sum of positive squares in 2 ways, for example, as 320356 + 100 = 566^2 + 10^2 .

It is an unprimeable number.

320456 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 3 ways as a sum of consecutive naturals, for example, 161 + ... + 816.

2³²⁰⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

320456 is a deficient number, since it is larger than the sum of its proper divisors (295684).

320456 is a wasteful number, since it uses less digits than its factorization.

320456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 320456 is about 566.0883323299. The cubic root of 320456 is about 68.4315119897.

Adding to 320456 its reverse (654023), we get a palindrome (974479).

The spelling of 320456 in words is "three hundred twenty thousand, four hundred fifty-six".