442323220 has 24 divisors (see below), whose sum is σ = 936198144. Its totient is φ = 175535136.

The previous prime is 442323209. The next prime is 442323247. The reversal of 442323220 is 22323244.

It is a junction number, because it is equal to n+sod(n) for n = 442323191 and 442323200.

It is a congruent number.

It is an unprimeable 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 in 7 ways as a sum of consecutive naturals, for example, 84532 + ... + 89611.

It is an arithmetic number, because the mean of its divisors is an integer number (39008256).

Almost surely, 2^442323220 is an apocalyptic number.

It is an amenable number.

442323220 is an abundant number, since it is smaller than the sum of its proper divisors (493874924).

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

442323220 is a wasteful number, since it uses less digits than its factorization.

442323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174279 (or 174277 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 442323220 is about 21031.4816406263. The cubic root of 442323220 is about 761.9267937838.

Adding to 442323220 its reverse (22323244), we get a palindrome (464646464).

The spelling of 442323220 in words is "four hundred forty-two million, three hundred twenty-three thousand, two hundred twenty".