8501228 has 12 divisors (see below), whose sum is σ = 15099672. Its totient is φ = 4187040.

The previous prime is 8501221. The next prime is 8501239. The reversal of 8501228 is 8221058.

It is a junction number, because it is equal to n+sod(n) for n = 8501197 and 8501206.

It is not an unprimeable number, because it can be changed into a prime (8501221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15593 + ... + 16128.

It is an arithmetic number, because the mean of its divisors is an integer number (1258306).

Almost surely, 2^8501228 is an apocalyptic number.

8501228 is the 1559-th centered heptagonal number.

It is an amenable number.

8501228 is a deficient number, since it is larger than the sum of its proper divisors (6598444).

8501228 is a wasteful number, since it uses less digits than its factorization.

8501228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31792 (or 31790 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 8501228 is about 2915.6865400794. The cubic root of 8501228 is about 204.0925826078.

Subtracting from 8501228 its product of nonzero digits (1280), we obtain a palindrome (8499948).

The spelling of 8501228 in words is "eight million, five hundred one thousand, two hundred twenty-eight".