9871228 has 12 divisors (see below), whose sum is σ = 17428320. Its totient is φ = 4891712.

The previous prime is 9871219. The next prime is 9871229. The reversal of 9871228 is 8221789.

It is a super-2 number, since 2×9871228² = 194882284455968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10468 + ... + 11371.

It is an arithmetic number, because the mean of its divisors is an integer number (1452360).

Almost surely, 2^9871228 is an apocalyptic number.

It is an amenable number.

9871228 is a deficient number, since it is larger than the sum of its proper divisors (7557092).

9871228 is a wasteful number, since it uses less digits than its factorization.

9871228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21956 (or 21954 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 9871228 is about 3141.8510467557. The cubic root of 9871228 is about 214.5147013323.

The spelling of 9871228 in words is "nine million, eight hundred seventy-one thousand, two hundred twenty-eight".