2109228 has 72 divisors (see below), whose sum is σ = 5853120. Its totient is φ = 584640.

The previous prime is 2109223. The next prime is 2109253. The reversal of 2109228 is 8229012.

It is a junction number, because it is equal to n+sod(n) for n = 2109198 and 2109207.

It is not an unprimeable number, because it can be changed into a prime (2109223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72718 + ... + 72746.

2^2109228 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 2109228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2926560).

2109228 is an abundant number, since it is smaller than the sum of its proper divisors (3743892).

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

2109228 is a wasteful number, since it uses less digits than its factorization.

2109228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2109228 is about 1452.3181469637. The cubic root of 2109228 is about 128.2452167735.

The spelling of 2109228 in words is "two million, one hundred nine thousand, two hundred twenty-eight".