442345423 has 24 divisors (see below), whose sum is σ = 509055120. Its totient is φ = 382018560.

The previous prime is 442345391. The next prime is 442345451. The reversal of 442345423 is 324543244.

It is not a de Polignac number, because 442345423 - 2⁵ = 442345391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442345493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1055508 + ... + 1055926.

It is an arithmetic number, because the mean of its divisors is an integer number (21210630).

Almost surely, 2^442345423 is an apocalyptic number.

442345423 is a deficient number, since it is larger than the sum of its proper divisors (66709697).

442345423 is a wasteful number, since it uses less digits than its factorization.

442345423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 730 counting only the distinct ones).

The product of its digits is 46080, while the sum is 31.

The square root of 442345423 is about 21032.0094855437. The cubic root of 442345423 is about 761.9395422121.

Adding to 442345423 its reverse (324543244), we get a palindrome (766888667).

The spelling of 442345423 in words is "four hundred forty-two million, three hundred forty-five thousand, four hundred twenty-three".