5218866 has 12 divisors (see below), whose sum is σ = 11307582. Its totient is φ = 1739616.

The previous prime is 5218853. The next prime is 5218879. The reversal of 5218866 is 6688125.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5218853) and next prime (5218879).

It can be written as a sum of positive squares in only one way, i.e., 3884841 + 1334025 = 1971^2 + 1155^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5218866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144951 + ... + 144986.

Almost surely, 2^5218866 is an apocalyptic number.

5218866 is an abundant number, since it is smaller than the sum of its proper divisors (6088716).

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

5218866 is a wasteful number, since it uses less digits than its factorization.

5218866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289945 (or 289942 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 5218866 is about 2284.4837491215. The cubic root of 5218866 is about 173.4570870014.

It can be divided in two parts, 5218 and 866, that added together give a square (6084 = 78²).

The spelling of 5218866 in words is "five million, two hundred eighteen thousand, eight hundred sixty-six".