805812 has 48 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 224640.

The previous prime is 805811. The next prime is 805843. The reversal of 805812 is 218508.

805812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805812.

It is not an unprimeable number, because it can be changed into a prime (805811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4362 + ... + 4542.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2⁸⁰⁵⁸¹² 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 805812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100736).

805812 is an abundant number, since it is smaller than the sum of its proper divisors (1395660).

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

805812 is a wasteful number, since it uses less digits than its factorization.

805812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 805812 is about 897.6703181013. The cubic root of 805812 is about 93.0560420690.

The spelling of 805812 in words is "eight hundred five thousand, eight hundred twelve".