109228 has 24 divisors (see below), whose sum is σ = 225792. Its totient is φ = 45264.

The previous prime is 109211. The next prime is 109229. The reversal of 109228 is 822901.

It is a plaindrome in base 15 and base 16.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 109199 and 109208.

It is not an unprimeable number, because it can be changed into a prime (109229) by changing a digit.

109228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (9408).

2¹⁰⁹²²⁸ 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 109228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112896).

109228 is an abundant number, since it is smaller than the sum of its proper divisors (116564).

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

109228 is a wasteful number, since it uses less digits than its factorization.

109228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 109228 is about 330.4965960490. The cubic root of 109228 is about 47.8018451346.

The spelling of 109228 in words is "one hundred nine thousand, two hundred twenty-eight".