442440323 has 4 divisors (see below), whose sum is σ = 476474208. Its totient is φ = 408406440.

The previous prime is 442440319. The next prime is 442440331. The reversal of 442440323 is 323044244.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 442440323 - 2² = 442440319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442440292 and 442440301.

It is not an unprimeable number, because it can be changed into a prime (442440353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17016923 + ... + 17016948.

It is an arithmetic number, because the mean of its divisors is an integer number (119118552).

Almost surely, 2^442440323 is an apocalyptic number.

442440323 is a deficient number, since it is larger than the sum of its proper divisors (34033885).

442440323 is a wasteful number, since it uses less digits than its factorization.

442440323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34033884.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 442440323 is about 21034.2654494993. The cubic root of 442440323 is about 761.9940267005.

Adding to 442440323 its reverse (323044244), we get a palindrome (765484567).

The spelling of 442440323 in words is "four hundred forty-two million, four hundred forty thousand, three hundred twenty-three".