6816856 has 16 divisors (see below), whose sum is σ = 13222800. Its totient is φ = 3290784.

The previous prime is 6816853. The next prime is 6816871. The reversal of 6816856 is 6586186.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6816851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14460 + ... + 14923.

It is an arithmetic number, because the mean of its divisors is an integer number (826425).

Almost surely, 2^6816856 is an apocalyptic number.

It is an amenable number.

6816856 is a deficient number, since it is larger than the sum of its proper divisors (6405944).

6816856 is a wasteful number, since it uses less digits than its factorization.

6816856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29418 (or 29414 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 6816856 is about 2610.9109521391. The cubic root of 6816856 is about 189.6100589891.

The spelling of 6816856 in words is "six million, eight hundred sixteen thousand, eight hundred fifty-six".