812747218 has 8 divisors (see below), whose sum is σ = 1245059712. Its totient is φ = 397727316.

The previous prime is 812747197. The next prime is 812747227.

812747218 is nontrivially palindromic in base 10.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4323030 + ... + 4323217.

It is an arithmetic number, because the mean of its divisors is an integer number (155632464).

Almost surely, 2^812747218 is an apocalyptic number.

812747218 is a deficient number, since it is larger than the sum of its proper divisors (432312494).

812747218 is a wasteful number, since it uses less digits than its factorization.

812747218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8646296.

The product of its digits is 50176, while the sum is 40.

The square root of 812747218 is about 28508.7217882528. The cubic root of 812747218 is about 933.2224200117. Note that the first 3 decimals are identical.

The spelling of 812747218 in words is "eight hundred twelve million, seven hundred forty-seven thousand, two hundred eighteen".