812844 has 36 divisors (see below), whose sum is σ = 2091544. Its totient is φ = 266112.

The previous prime is 812807. The next prime is 812849. The reversal of 812844 is 448218.

812844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (812849) by changing a digit.

812844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2244 + ... + 2580.

2⁸¹²⁸⁴⁴ 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 812844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045772).

812844 is an abundant number, since it is smaller than the sum of its proper divisors (1278700).

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

812844 is a wasteful number, since it uses less digits than its factorization.

812844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 409 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 812844 is about 901.5786155405. The cubic root of 812844 is about 93.3259461273.

The spelling of 812844 in words is "eight hundred twelve thousand, eight hundred forty-four".