2808856 has 16 divisors (see below), whose sum is σ = 5284800. Its totient is φ = 1399584.

The previous prime is 2808847. The next prime is 2808863. The reversal of 2808856 is 6588082.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466 + ... + 4198.

It is an arithmetic number, because the mean of its divisors is an integer number (330300).

2^2808856 is an apocalyptic number.

It is an amenable number.

2808856 is a deficient number, since it is larger than the sum of its proper divisors (2475944).

2808856 is a wasteful number, since it uses less digits than its factorization.

2808856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 2808856 is about 1675.9642000950. The cubic root of 2808856 is about 141.0944155795.

The spelling of 2808856 in words is "two million, eight hundred eight thousand, eight hundred fifty-six".