320682856 has 32 divisors (see below), whose sum is σ = 658161000. Its totient is φ = 145578240.

The previous prime is 320682851. The next prime is 320682889. The reversal of 320682856 is 658286023.

It can be written as a sum of positive squares in 4 ways, for example, as 173448900 + 147233956 = 13170^2 + 12134^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (320682851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18931 + ... + 31618.

Almost surely, 2^320682856 is an apocalyptic number.

It is an amenable number.

320682856 is an abundant number, since it is smaller than the sum of its proper divisors (337478144).

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

320682856 is a wasteful number, since it uses less digits than its factorization.

320682856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50629 (or 50625 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 320682856 is about 17907.6200540440. The cubic root of 320682856 is about 684.4765610652.

The spelling of 320682856 in words is "three hundred twenty million, six hundred eighty-two thousand, eight hundred fifty-six".