2851806 has 8 divisors (see below), whose sum is σ = 5703624. Its totient is φ = 950600.

The previous prime is 2851799. The next prime is 2851813. The reversal of 2851806 is 6081582.

It is an interprime number because it is at equal distance from previous prime (2851799) and next prime (2851813).

It is a sphenic number, since it is the product of 3 distinct primes.

2851806 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 237645 + ... + 237656.

It is an arithmetic number, because the mean of its divisors is an integer number (712953).

2^2851806 is an apocalyptic number.

2851806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2851806 is a wasteful number, since it uses less digits than its factorization.

2851806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475306.

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

The square root of 2851806 is about 1688.7291079389. The cubic root of 2851806 is about 141.8099354927.

The spelling of 2851806 in words is "two million, eight hundred fifty-one thousand, eight hundred six".