2801856 has 28 divisors (see below), whose sum is σ = 7413752. Its totient is φ = 933888.

The previous prime is 2801833. The next prime is 2801857. The reversal of 2801856 is 6581082.

It is not an unprimeable number, because it can be changed into a prime (2801857) 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, 7105 + ... + 7488.

2^2801856 is an apocalyptic number.

It is an amenable number.

2801856 is an abundant number, since it is smaller than the sum of its proper divisors (4611896).

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

2801856 is a wasteful number, since it uses less digits than its factorization.

2801856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608 (or 14598 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 2801856 is about 1673.8745472705. The cubic root of 2801856 is about 140.9771101115.

The spelling of 2801856 in words is "two million, eight hundred one thousand, eight hundred fifty-six".