8538220 has 24 divisors (see below), whose sum is σ = 18874800. Its totient is φ = 3235392.

The previous prime is 8538193. The next prime is 8538223. The reversal of 8538220 is 228358.

It is not an unprimeable number, because it can be changed into a prime (8538223) 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, 10855 + ... + 11614.

It is an arithmetic number, because the mean of its divisors is an integer number (786450).

Almost surely, 2^8538220 is an apocalyptic number.

It is an amenable number.

8538220 is an abundant number, since it is smaller than the sum of its proper divisors (10336580).

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

8538220 is a wasteful number, since it uses less digits than its factorization.

8538220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22497 (or 22495 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 8538220 is about 2922.0232716390. The cubic root of 8538220 is about 204.3881818068.

The spelling of 8538220 in words is "eight million, five hundred thirty-eight thousand, two hundred twenty".