442242220 has 24 divisors (see below), whose sum is σ = 1061381664. Its totient is φ = 151625856.

The previous prime is 442242209. The next prime is 442242289. The reversal of 442242220 is 22242244.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 442242191 and 442242200.

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, 1579297 + ... + 1579576.

It is an arithmetic number, because the mean of its divisors is an integer number (44224236).

Almost surely, 2^442242220 is an apocalyptic number.

It is an amenable number.

442242220 is an abundant number, since it is smaller than the sum of its proper divisors (619139444).

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

442242220 is a wasteful number, since it uses less digits than its factorization.

442242220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158889 (or 3158887 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 442242220 is about 21029.5558678732. Note that the first 3 decimals coincide. The cubic root of 442242220 is about 761.8802819156.

Adding to 442242220 its reverse (22242244), we get a palindrome (464484464).

The spelling of 442242220 in words is "four hundred forty-two million, two hundred forty-two thousand, two hundred twenty".