8530220 has 24 divisors (see below), whose sum is σ = 18219600. Its totient is φ = 3353792.

The previous prime is 8530219. The next prime is 8530229. The reversal of 8530220 is 220358.

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 = 8530192 and 8530201.

It is not an unprimeable number, because it can be changed into a prime (8530229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2435 + ... + 4794.

It is an arithmetic number, because the mean of its divisors is an integer number (759150).

Almost surely, 2^8530220 is an apocalyptic number.

It is an amenable number.

8530220 is an abundant number, since it is smaller than the sum of its proper divisors (9689380).

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

8530220 is a wasteful number, since it uses less digits than its factorization.

8530220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7297 (or 7295 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 8530220 is about 2920.6540363419. The cubic root of 8530220 is about 204.3243271080.

Adding to 8530220 its reverse (220358), we get a palindrome (8750578).

The spelling of 8530220 in words is "eight million, five hundred thirty thousand, two hundred twenty".