2851812 has 36 divisors (see below), whose sum is σ = 7407036. Its totient is φ = 924480.

The previous prime is 2851799. The next prime is 2851813. The reversal of 2851812 is 2181582.

2851812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2643876 + 207936 = 1626^2 + 456^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2851813) 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 11 ways as a sum of consecutive naturals, for example, 262 + ... + 2402.

It is an arithmetic number, because the mean of its divisors is an integer number (205751).

2^2851812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2851812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3703518).

2851812 is an abundant number, since it is smaller than the sum of its proper divisors (4555224).

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

2851812 is a wasteful number, since it uses less digits than its factorization.

2851812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2183 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 2851812 is about 1688.7308844218. The cubic root of 2851812 is about 141.8100349453.

It can be divided in two parts, 2851 and 812, that added together give a palindrome (3663).

The spelling of 2851812 in words is "two million, eight hundred fifty-one thousand, eight hundred twelve".