812540804 has 12 divisors (see below), whose sum is σ = 1422721104. Its totient is φ = 406049064.

The previous prime is 812540761. The next prime is 812540837. The reversal of 812540804 is 408045218.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46934 + ... + 61869.

It is an arithmetic number, because the mean of its divisors is an integer number (118560092).

Almost surely, 2^812540804 is an apocalyptic number.

It is an amenable number.

812540804 is a deficient number, since it is larger than the sum of its proper divisors (610180300).

812540804 is a wasteful number, since it uses less digits than its factorization.

812540804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110674 (or 110672 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 812540804 is about 28505.1013680008. The cubic root of 812540804 is about 933.1434095977.

The spelling of 812540804 in words is "eight hundred twelve million, five hundred forty thousand, eight hundred four".