8620220 has 48 divisors (see below), whose sum is σ = 21020160. Its totient is φ = 2908224.

The previous prime is 8620219. The next prime is 8620231. The reversal of 8620220 is 220268.

8620220 is digitally balanced in base 5, 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 8620192 and 8620201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8921 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (437920).

Almost surely, 2^8620220 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 8620220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10510080).

8620220 is an abundant number, since it is smaller than the sum of its proper divisors (12399940).

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

8620220 is a wasteful number, since it uses less digits than its factorization.

8620220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 8620220 is about 2936.0211170903. The cubic root of 8620220 is about 205.0404044889.

Adding to 8620220 its reverse (220268), we get a palindrome (8840488).

The spelling of 8620220 in words is "eight million, six hundred twenty thousand, two hundred twenty".