812947904 has 14 divisors (see below), whose sum is σ = 1613193624. Its totient is φ = 406473920.

The previous prime is 812947873. The next prime is 812947909. The reversal of 812947904 is 409749218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812947909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6351092 + ... + 6351219.

It is an arithmetic number, because the mean of its divisors is an integer number (115228116).

Almost surely, 2^812947904 is an apocalyptic number.

It is an amenable number.

812947904 is a deficient number, since it is larger than the sum of its proper divisors (800245720).

812947904 is a wasteful number, since it uses less digits than its factorization.

812947904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12702323 (or 12702313 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 812947904 is about 28512.2413008869. The cubic root of 812947904 is about 933.2992250574.

It can be divided in two parts, 81294 and 7904, that added together give a palindrome (89198).

The spelling of 812947904 in words is "eight hundred twelve million, nine hundred forty-seven thousand, nine hundred four".