812287866 has 32 divisors (see below), whose sum is σ = 1756903680. Its totient is φ = 248883264.

The previous prime is 812287837. The next prime is 812287871. The reversal of 812287866 is 668782218.

812287866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3145 + ... + 40428.

It is an arithmetic number, because the mean of its divisors is an integer number (54903240).

Almost surely, 2^812287866 is an apocalyptic number.

812287866 is an abundant number, since it is smaller than the sum of its proper divisors (944615814).

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

812287866 is a wasteful number, since it uses less digits than its factorization.

812287866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43830.

The product of its digits is 516096, while the sum is 48.

The square root of 812287866 is about 28500.6643080473. The cubic root of 812287866 is about 933.0465726463.

The spelling of 812287866 in words is "eight hundred twelve million, two hundred eighty-seven thousand, eight hundred sixty-six".