812818 has 8 divisors (see below), whose sum is σ = 1245312. Its totient is φ = 397716.

The previous prime is 812807. The next prime is 812849. The reversal of 812818 is 818218.

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

It is a super-2 number, since 2×812818² = 1321346202248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4230 + ... + 4417.

It is an arithmetic number, because the mean of its divisors is an integer number (155664).

2⁸¹²⁸¹⁸ is an apocalyptic number.

812818 is a deficient number, since it is larger than the sum of its proper divisors (432494).

812818 is a wasteful number, since it uses less digits than its factorization.

812818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8696.

The product of its digits is 1024, while the sum is 28.

The square root of 812818 is about 901.5641962722. The cubic root of 812818 is about 93.3249510613.

The spelling of 812818 in words is "eight hundred twelve thousand, eight hundred eighteen".