812640084 has 24 divisors (see below), whose sum is σ = 1899374400. Its totient is φ = 270420864.

The previous prime is 812640047. The next prime is 812640091. The reversal of 812640084 is 480046218.

It is a super-2 number, since 2×812640084² = 1320767812247054112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 49984 + ... + 64215.

It is an arithmetic number, because the mean of its divisors is an integer number (79140600).

Almost surely, 2^812640084 is an apocalyptic number.

It is an amenable number.

812640084 is an abundant number, since it is smaller than the sum of its proper divisors (1086734316).

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

812640084 is a wasteful number, since it uses less digits than its factorization.

812640084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114799 (or 114797 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 812640084 is about 28506.8427574854. The cubic root of 812640084 is about 933.1814133116.

The spelling of 812640084 in words is "eight hundred twelve million, six hundred forty thousand, eighty-four".