442772228 has 6 divisors (see below), whose sum is σ = 774851406. Its totient is φ = 221386112.

The previous prime is 442772227. The next prime is 442772233. The reversal of 442772228 is 822277244.

It can be written as a sum of positive squares in only one way, i.e., 406748224 + 36024004 = 20168^2 + 6002^2 .

It is a junction number, because it is equal to n+sod(n) for n = 442772191 and 442772200.

It is not an unprimeable number, because it can be changed into a prime (442772227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55346525 + ... + 55346532.

It is an arithmetic number, because the mean of its divisors is an integer number (129141901).

Almost surely, 2^442772228 is an apocalyptic number.

It is an amenable number.

442772228 is a deficient number, since it is larger than the sum of its proper divisors (332079178).

442772228 is a wasteful number, since it uses less digits than its factorization.

442772228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110693061 (or 110693059 counting only the distinct ones).

The product of its digits is 100352, while the sum is 38.

The square root of 442772228 is about 21042.1535970062. The cubic root of 442772228 is about 762.1845204982.

The spelling of 442772228 in words is "four hundred forty-two million, seven hundred seventy-two thousand, two hundred twenty-eight".