12811844 has 12 divisors (see below), whose sum is σ = 22967868. Its totient is φ = 6249600.

The previous prime is 12811811. The next prime is 12811847. The reversal of 12811844 is 44811821.

It is a happy number.

12811844 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 3276100 + 9535744 = 1810^2 + 3088^2 .

It is not an unprimeable number, because it can be changed into a prime (12811847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38897 + ... + 39224.

It is an arithmetic number, because the mean of its divisors is an integer number (1913989).

Almost surely, 2^12811844 is an apocalyptic number.

It is an amenable number.

12811844 is a deficient number, since it is larger than the sum of its proper divisors (10156024).

12811844 is a wasteful number, since it uses less digits than its factorization.

12811844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78166 (or 78164 counting only the distinct ones).

The product of its digits is 2048, while the sum is 29.

The square root of 12811844 is about 3579.3636305913. The cubic root of 12811844 is about 233.9935469523.

It can be divided in two parts, 1281 and 1844, that added together give a 5-th power (3125 = 5⁵).

The spelling of 12811844 in words is "twelve million, eight hundred eleven thousand, eight hundred forty-four".