818812 has 12 divisors (see below), whose sum is σ = 1440040. Its totient is φ = 407376.

The previous prime is 818723. The next prime is 818813. The reversal of 818812 is 218818.

818812 is nontrivially palindromic in base 16.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818813) by changing a digit.

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, 739 + ... + 1477.

2⁸¹⁸⁸¹² is an apocalyptic number.

818812 is the 739-th pentagonal number.

It is an amenable number.

818812 is a deficient number, since it is larger than the sum of its proper divisors (621228).

818812 is a wasteful number, since it uses less digits than its factorization.

818812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 1018 counting only the distinct ones).

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

The square root of 818812 is about 904.8823127899. The cubic root of 818812 is about 93.5537929087.

The spelling of 818812 in words is "eight hundred eighteen thousand, eight hundred twelve".