8668220 has 72 divisors (see below), whose sum is σ = 21019824. Its totient is φ = 2976000.

The previous prime is 8668207. The next prime is 8668267. The reversal of 8668220 is 228668.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211400 + ... + 211440.

It is an arithmetic number, because the mean of its divisors is an integer number (291942).

Almost surely, 2^8668220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8668220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10509912).

8668220 is an abundant number, since it is smaller than the sum of its proper divisors (12351604).

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

8668220 is a wasteful number, since it uses less digits than its factorization.

8668220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 8668220 is about 2944.1840975048. The cubic root of 8668220 is about 205.4202760035.

It can be divided in two parts, 8668 and 220, that added together give a palindrome (8888).

The spelling of 8668220 in words is "eight million, six hundred sixty-eight thousand, two hundred twenty".