8439228 has 90 divisors (see below), whose sum is σ = 25633608. Its totient is φ = 2371680.

The previous prime is 8439217. The next prime is 8439241. The reversal of 8439228 is 8229348.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 8 + 4⁷ + 3⁶ + 9³ + 2 + 2²³ + 8⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 8439192 and 8439201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 138318 + ... + 138378.

Almost surely, 2^8439228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8439228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12816804).

8439228 is an abundant number, since it is smaller than the sum of its proper divisors (17194380).

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

8439228 is a wasteful number, since it uses less digits than its factorization.

8439228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 73 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 8439228 is about 2905.0349395489. The cubic root of 8439228 is about 203.5952181142.

The spelling of 8439228 in words is "eight million, four hundred thirty-nine thousand, two hundred twenty-eight".