22228 has 6 divisors (see below), whose sum is σ = 38906. Its totient is φ = 11112.

The previous prime is 22193. The next prime is 22229. The reversal of 22228 is 82222.

It can be written as a sum of positive squares in only one way, i.e., 21904 + 324 = 148^2 + 18^2 .

It is a plaindrome in base 10, base 11 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22229) by changing a digit.

22228 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 as a sum of consecutive naturals, namely, 2775 + ... + 2782.

2²²²²⁸ is an apocalyptic number.

It is an amenable number.

22228 is a deficient number, since it is larger than the sum of its proper divisors (16678).

22228 is a wasteful number, since it uses less digits than its factorization.

22228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561 (or 5559 counting only the distinct ones).

The product of its digits is 128, while the sum is 16.

The square root of 22228 is about 149.0905764963. The cubic root of 22228 is about 28.1168585488.

It can be divided in two parts, 222 and 28, that multiplied together give a triangular number (6216 = T₁₁₁).

The spelling of 22228 in words is "twenty-two thousand, two hundred twenty-eight".