8520228 has 30 divisors (see below), whose sum is σ = 22274406. Its totient is φ = 2839968.

The previous prime is 8520191. The next prime is 8520241. The reversal of 8520228 is 8220258.

It can be written as a sum of positive squares in only one way, i.e., 7193124 + 1327104 = 2682^2 + 1152^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12825 + ... + 13472.

Almost surely, 2^8520228 is an apocalyptic number.

It is an amenable number.

8520228 is an abundant number, since it is smaller than the sum of its proper divisors (13754178).

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

8520228 is a wasteful number, since it uses less digits than its factorization.

8520228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26313 (or 26302 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 8520228 is about 2918.9429593605. The cubic root of 8520228 is about 204.2445164915.

The spelling of 8520228 in words is "eight million, five hundred twenty thousand, two hundred twenty-eight".