812643910 has 32 divisors (see below), whose sum is σ = 1579596480. Its totient is φ = 299230848.

The previous prime is 812643899. The next prime is 812643929. The reversal of 812643910 is 19346218.

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 15 ways as a sum of consecutive naturals, for example, 40111 + ... + 56869.

It is an arithmetic number, because the mean of its divisors is an integer number (49362390).

Almost surely, 2^812643910 is an apocalyptic number.

812643910 is a deficient number, since it is larger than the sum of its proper divisors (766952570).

812643910 is a wasteful number, since it uses less digits than its factorization.

812643910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17152.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 812643910 is about 28506.9098641014. The cubic root of 812643910 is about 933.1828778167.

The spelling of 812643910 in words is "eight hundred twelve million, six hundred forty-three thousand, nine hundred ten".