442320020 has 12 divisors (see below), whose sum is σ = 928872084. Its totient is φ = 176928000.

The previous prime is 442320001. The next prime is 442320029. The reversal of 442320020 is 20023244.

It can be written as a sum of positive squares in 2 ways, for example, as 50438404 + 391881616 = 7102^2 + 19796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442320029) 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, 11057981 + ... + 11058020.

It is an arithmetic number, because the mean of its divisors is an integer number (77406007).

Almost surely, 2^442320020 is an apocalyptic number.

It is an amenable number.

442320020 is an abundant number, since it is smaller than the sum of its proper divisors (486552064).

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

442320020 is a wasteful number, since it uses less digits than its factorization.

442320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22116010 (or 22116008 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 442320020 is about 21031.4055640606. The cubic root of 442320020 is about 761.9249563856.

Adding to 442320020 its reverse (20023244), we get a palindrome (462343264).

The spelling of 442320020 in words is "four hundred forty-two million, three hundred twenty thousand, twenty".