812906984 has 32 divisors (see below), whose sum is σ = 1564620840. Its totient is φ = 395808000.

The previous prime is 812906977. The next prime is 812906987. The reversal of 812906984 is 489609218.

It can be written as a sum of positive squares in 4 ways, for example, as 466128100 + 346778884 = 21590^2 + 18622^2 .

It is not an unprimeable number, because it can be changed into a prime (812906987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41042 + ... + 57534.

Almost surely, 2^812906984 is an apocalyptic number.

It is an amenable number.

812906984 is a deficient number, since it is larger than the sum of its proper divisors (751713856).

812906984 is a wasteful number, since it uses less digits than its factorization.

812906984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16661 (or 16657 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 812906984 is about 28511.5237053371. The cubic root of 812906984 is about 933.2835654869.

The spelling of 812906984 in words is "eight hundred twelve million, nine hundred six thousand, nine hundred eighty-four".