812812 has 72 divisors (see below), whose sum is σ = 2010960. Its totient is φ = 282240.

The previous prime is 812807. The next prime is 812849. The reversal of 812812 is 218218.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28014 + ... + 28042.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2⁸¹²⁸¹² 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 812812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005480).

812812 is an abundant number, since it is smaller than the sum of its proper divisors (1198148).

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

812812 is a wasteful number, since it uses less digits than its factorization.

812812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 62 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 812812 is about 901.5608687160. The cubic root of 812812 is about 93.3247214276.

The spelling of 812812 in words is "eight hundred twelve thousand, eight hundred twelve".