8218836 has 18 divisors (see below), whose sum is σ = 20775482. Its totient is φ = 2739600.

The previous prime is 8218831. The next prime is 8218853. The reversal of 8218836 is 6388128.

It can be written as a sum of positive squares in only one way, i.e., 7128900 + 1089936 = 2670^2 + 1044^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 228301 = 8218836 / (8 + 2 + 1 + 8 + 8 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 8218836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8218831) 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 5 ways as a sum of consecutive naturals, for example, 114115 + ... + 114186.

Almost surely, 2^8218836 is an apocalyptic number.

It is an amenable number.

8218836 is an abundant number, since it is smaller than the sum of its proper divisors (12556646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8218836 is a wasteful number, since it uses less digits than its factorization.

8218836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228311 (or 228306 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 8218836 is about 2866.8512343685. The cubic root of 8218836 is about 201.8072533206.

The spelling of 8218836 in words is "eight million, two hundred eighteen thousand, eight hundred thirty-six".