442228 has 6 divisors (see below), whose sum is σ = 773906. Its totient is φ = 221112.

The previous prime is 442217. The next prime is 442229. The reversal of 442228 is 822244.

It can be written as a sum of positive squares in only one way, i.e., 272484 + 169744 = 522^2 + 412^2 .

It is a junction number, because it is equal to n+sod(n) for n = 442199 and 442208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442229) by changing a digit.

442228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55275 + ... + 55282.

2⁴⁴²²²⁸ is an apocalyptic number.

It is an amenable number.

442228 is a deficient number, since it is larger than the sum of its proper divisors (331678).

442228 is a wasteful number, since it uses less digits than its factorization.

442228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110561 (or 110559 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 442228 is about 665.0022556353. The cubic root of 442228 is about 76.1872115913.

The spelling of 442228 in words is "four hundred forty-two thousand, two hundred twenty-eight".