385686856 has 16 divisors (see below), whose sum is σ = 723455100. Its totient is φ = 192765504.

The previous prime is 385686817. The next prime is 385686857. The reversal of 385686856 is 658686583.

It can be written as a sum of positive squares in 2 ways, for example, as 352162756 + 33524100 = 18766^2 + 5790^2 .

It is a junction number, because it is equal to n+sod(n) for n = 385686797 and 385686806.

It is not an unprimeable number, because it can be changed into a prime (385686857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14986 + ... + 31558.

Almost surely, 2^385686856 is an apocalyptic number.

It is an amenable number.

385686856 is a deficient number, since it is larger than the sum of its proper divisors (337768244).

385686856 is a wasteful number, since it uses less digits than its factorization.

385686856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19488 (or 19484 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 55.

The square root of 385686856 is about 19638.9117824792. The cubic root of 385686856 is about 727.9109952372.

It can be divided in two parts, 385 and 686856, that added together give a square (687241 = 829²).

The spelling of 385686856 in words is "three hundred eighty-five million, six hundred eighty-six thousand, eight hundred fifty-six".