442220 has 12 divisors (see below), whose sum is σ = 928704. Its totient is φ = 176880.

The previous prime is 442217. The next prime is 442229. The reversal of 442220 is 22244.

It is a happy number.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 442195 and 442204.

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

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 3 ways as a sum of consecutive naturals, for example, 11036 + ... + 11075.

It is an arithmetic number, because the mean of its divisors is an integer number (77392).

2⁴⁴²²²⁰ is an apocalyptic number.

It is an amenable number.

442220 is an abundant number, since it is smaller than the sum of its proper divisors (486484).

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

442220 is a wasteful number, since it uses less digits than its factorization.

442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22120 (or 22118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 442220 is about 664.9962405909. The cubic root of 442220 is about 76.1867521741.

Adding to 442220 its reverse (22244), we get a palindrome (464464).

It can be divided in two parts, 4 and 42220, that added together give a palindrome (42224).

The spelling of 442220 in words is "four hundred forty-two thousand, two hundred twenty", and thus it is an iban number.