20228228 has 12 divisors (see below), whose sum is σ = 35434140. Its totient is φ = 10104192.

The previous prime is 20228207. The next prime is 20228239. The reversal of 20228228 is 82282202.

It can be written as a sum of positive squares in 2 ways, for example, as 8952064 + 11276164 = 2992^2 + 3358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20228197 and 20228206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3968 + ... + 7496.

It is an arithmetic number, because the mean of its divisors is an integer number (2952845).

Almost surely, 2^20228228 is an apocalyptic number.

It is an amenable number.

20228228 is a deficient number, since it is larger than the sum of its proper divisors (15205912).

20228228 is a wasteful number, since it uses less digits than its factorization.

20228228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966 (or 4964 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 20228228 is about 4497.5802383059. The cubic root of 20228228 is about 272.4703690812.

The spelling of 20228228 in words is "twenty million, two hundred twenty-eight thousand, two hundred twenty-eight".