442403305 has 4 divisors (see below), whose sum is σ = 530883972. Its totient is φ = 353922640.

The previous prime is 442403303. The next prime is 442403327. The reversal of 442403305 is 503304244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131974144 + 310429161 = 11488^2 + 17619^2 .

It is not a de Polignac number, because 442403305 - 2¹ = 442403303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442403305.

It is not an unprimeable number, because it can be changed into a prime (442403303) 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, 44240326 + ... + 44240335.

It is an arithmetic number, because the mean of its divisors is an integer number (132720993).

Almost surely, 2^442403305 is an apocalyptic number.

It is an amenable number.

442403305 is a deficient number, since it is larger than the sum of its proper divisors (88480667).

442403305 is an equidigital number, since it uses as much as digits as its factorization.

442403305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88480666.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 442403305 is about 21033.3854859364. The cubic root of 442403305 is about 761.9727746580.

Adding to 442403305 its reverse (503304244), we get a palindrome (945707549).

The spelling of 442403305 in words is "four hundred forty-two million, four hundred three thousand, three hundred five".