2800856 has 8 divisors (see below), whose sum is σ = 5251620. Its totient is φ = 1400424.

The previous prime is 2800843. The next prime is 2800859. The reversal of 2800856 is 6580082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2800859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175046 + ... + 175061.

2^2800856 is an apocalyptic number.

It is an amenable number.

2800856 is a deficient number, since it is larger than the sum of its proper divisors (2450764).

2800856 is a wasteful number, since it uses less digits than its factorization.

2800856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350113 (or 350109 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 2800856 is about 1673.5758124447. The cubic root of 2800856 is about 140.9603362439.

The spelling of 2800856 in words is "two million, eight hundred thousand, eight hundred fifty-six".