320500256 has 12 divisors (see below), whose sum is σ = 630984942. Its totient is φ = 160250112.

The previous prime is 320500247. The next prime is 320500261. The reversal of 320500256 is 652005023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 306810256 + 13690000 = 17516^2 + 3700^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5007785 + ... + 5007848.

Almost surely, 2^320500256 is an apocalyptic number.

It is an amenable number.

320500256 is a deficient number, since it is larger than the sum of its proper divisors (310484686).

320500256 is a wasteful number, since it uses less digits than its factorization.

320500256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10015643 (or 10015635 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 320500256 is about 17902.5209398006. The cubic root of 320500256 is about 684.3466204838.

Adding to 320500256 its reverse (652005023), we get a palindrome (972505279).

The spelling of 320500256 in words is "three hundred twenty million, five hundred thousand, two hundred fifty-six".