812343218 has 8 divisors (see below), whose sum is σ = 1222131612. Its totient is φ = 404966016.

The previous prime is 812343199. The next prime is 812343227.

812343218 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 710595649 + 101747569 = 26657^2 + 10087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

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 3 ways as a sum of consecutive naturals, for example, 601955 + ... + 603302.

Almost surely, 2^812343218 is an apocalyptic number.

812343218 is a deficient number, since it is larger than the sum of its proper divisors (409788394).

812343218 is a wasteful number, since it uses less digits than its factorization.

812343218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205596.

The product of its digits is 9216, while the sum is 32.

The square root of 812343218 is about 28501.6353565896. The cubic root of 812343218 is about 933.0677657983.

The spelling of 812343218 in words is "eight hundred twelve million, three hundred forty-three thousand, two hundred eighteen".