8729228 has 48 divisors (see below), whose sum is σ = 17273088. Its totient is φ = 3840000.

The previous prime is 8729221. The next prime is 8729239. The reversal of 8729228 is 8229278.

Its product of digits (32256) is a multiple of the sum of its prime divisors (192).

It is a junction number, because it is equal to n+sod(n) for n = 8729191 and 8729200.

It is not an unprimeable number, because it can be changed into a prime (8729221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86378 + ... + 86478.

It is an arithmetic number, because the mean of its divisors is an integer number (359856).

Almost surely, 2^8729228 is an apocalyptic number.

It is an amenable number.

8729228 is a deficient number, since it is larger than the sum of its proper divisors (8543860).

8729228 is a wasteful number, since it uses less digits than its factorization.

8729228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 192 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 8729228 is about 2954.5266964439. The cubic root of 8729228 is about 205.9010741903.

The spelling of 8729228 in words is "eight million, seven hundred twenty-nine thousand, two hundred twenty-eight".