2856089 has 4 divisors (see below), whose sum is σ = 2862900. Its totient is φ = 2849280.

The previous prime is 2856083. The next prime is 2856097. The reversal of 2856089 is 9806582.

2856089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1210000 + 1646089 = 1100^2 + 1283^2 .

It is a cyclic number.

It is not a de Polignac number, because 2856089 - 2²⁰ = 1807513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2856083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732 + ... + 3629.

It is an arithmetic number, because the mean of its divisors is an integer number (715725).

2^2856089 is an apocalyptic number.

It is an amenable number.

2856089 is a deficient number, since it is larger than the sum of its proper divisors (6811).

2856089 is an equidigital number, since it uses as much as digits as its factorization.

2856089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 2856089 is about 1689.9967455590. The cubic root of 2856089 is about 141.8808926505.

The spelling of 2856089 in words is "two million, eight hundred fifty-six thousand, eighty-nine".