812851312 has 80 divisors (see below), whose sum is σ = 2040424960. Its totient is φ = 304632576.

The previous prime is 812851283. The next prime is 812851313. The reversal of 812851312 is 213158218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812851313) 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 15 ways as a sum of consecutive naturals, for example, 12973 + ... + 42355.

It is an arithmetic number, because the mean of its divisors is an integer number (25505312).

Almost surely, 2^812851312 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 812851312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1020212480).

812851312 is an abundant number, since it is smaller than the sum of its proper divisors (1227573648).

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

812851312 is a wasteful number, since it uses less digits than its factorization.

812851312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29430 (or 29424 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 812851312 is about 28510.5473816270. The cubic root of 812851312 is about 933.2622596672.

The spelling of 812851312 in words is "eight hundred twelve million, eight hundred fifty-one thousand, three hundred twelve".