812286818 has 18 divisors (see below), whose sum is σ = 1417850091. Its totient is φ = 348002004.

The previous prime is 812286817. The next prime is 812286847. The reversal of 812286818 is 818682218.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 406143409 + 406143409 = 20153^2 + 20153^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20153.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (812286817) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 280703 + ... + 283581.

Almost surely, 2^812286818 is an apocalyptic number.

812286818 is a deficient number, since it is larger than the sum of its proper divisors (605563273).

812286818 is an frugal number, since it uses more digits than its factorization.

812286818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5774 (or 2888 counting only the distinct ones).

The product of its digits is 98304, while the sum is 44.

The square root of 812286818 is about 28500.6459225050. The cubic root of 812286818 is about 933.0461713792.

The spelling of 812286818 in words is "eight hundred twelve million, two hundred eighty-six thousand, eight hundred eighteen".