11866218 has 64 divisors (see below), whose sum is σ = 29632512. Its totient is φ = 3084480.

The previous prime is 11866213. The next prime is 11866247. The reversal of 11866218 is 81266811.

It is not an unprimeable number, because it can be changed into a prime (11866213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56133 + ... + 56343.

It is an arithmetic number, because the mean of its divisors is an integer number (463008).

Almost surely, 2^11866218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11866218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14816256).

11866218 is an abundant number, since it is smaller than the sum of its proper divisors (17766294).

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

11866218 is a wasteful number, since it uses less digits than its factorization.

11866218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its digits is 4608, while the sum is 33.

The square root of 11866218 is about 3444.7377258654. The cubic root of 11866218 is about 228.0888773229.

The spelling of 11866218 in words is "eleven million, eight hundred sixty-six thousand, two hundred eighteen".