320204856 has 16 divisors (see below), whose sum is σ = 800512200. Its totient is φ = 106734944.

The previous prime is 320204849. The next prime is 320204869. The reversal of 320204856 is 658402023.

It is a super-2 number, since 2×320204856² = 205062299611961472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6670911 + ... + 6670958.

Almost surely, 2^320204856 is an apocalyptic number.

It is an amenable number.

320204856 is an abundant number, since it is smaller than the sum of its proper divisors (480307344).

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

320204856 is a wasteful number, since it uses less digits than its factorization.

320204856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13341878 (or 13341874 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 320204856 is about 17894.2688031671. The cubic root of 320204856 is about 684.1363053825.

Adding to 320204856 its reverse (658402023), we get a palindrome (978606879).

The spelling of 320204856 in words is "three hundred twenty million, two hundred four thousand, eight hundred fifty-six".