812136582 has 24 divisors (see below), whose sum is σ = 1760243160. Its totient is φ = 270617760.

The previous prime is 812136581. The next prime is 812136599. The reversal of 812136582 is 285631218.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812136581) 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 11 ways as a sum of consecutive naturals, for example, 61857 + ... + 73827.

It is an arithmetic number, because the mean of its divisors is an integer number (73343465).

Almost surely, 2^812136582 is an apocalyptic number.

812136582 is an abundant number, since it is smaller than the sum of its proper divisors (948106578).

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

812136582 is a wasteful number, since it uses less digits than its factorization.

812136582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15748 (or 15745 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 812136582 is about 28498.0101410607. The cubic root of 812136582 is about 932.9886441755.

The spelling of 812136582 in words is "eight hundred twelve million, one hundred thirty-six thousand, five hundred eighty-two".