3220218 has 48 divisors (see below), whose sum is σ = 7488000. Its totient is φ = 997920.

The previous prime is 3220211. The next prime is 3220219. The reversal of 3220218 is 8120223.

It is a happy number.

3220218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 3220218.

It is not an unprimeable number, because it can be changed into a prime (3220211) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 16083 + ... + 16281.

It is an arithmetic number, because the mean of its divisors is an integer number (156000).

Almost surely, 2^3220218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3220218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3744000).

3220218 is an abundant number, since it is smaller than the sum of its proper divisors (4267782).

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

3220218 is a wasteful number, since it uses less digits than its factorization.

3220218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3220218 is about 1794.4965867897. The cubic root of 3220218 is about 147.6709575759.

The spelling of 3220218 in words is "three million, two hundred twenty thousand, two hundred eighteen".