2816856 has 128 divisors (see below), whose sum is σ = 9446400. Its totient is φ = 769824.

The previous prime is 2816839. The next prime is 2816861. The reversal of 2816856 is 6586182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2816856.

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 31 ways as a sum of consecutive naturals, for example, 122461 + ... + 122483.

It is an arithmetic number, because the mean of its divisors is an integer number (73800).

2^2816856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2816856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4723200).

2816856 is an abundant number, since it is smaller than the sum of its proper divisors (6629544).

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

2816856 is an equidigital number, since it uses as much as digits as its factorization.

2816856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 35 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2816856 is about 1678.3491889354. The cubic root of 2816856 is about 141.2282405722.

It can be divided in two parts, 28168 and 56, that added together give a square (28224 = 168²).

The spelling of 2816856 in words is "two million, eight hundred sixteen thousand, eight hundred fifty-six".