442403423 has 16 divisors (see below), whose sum is σ = 556638720. Its totient is φ = 341560800.

The previous prime is 442403419. The next prime is 442403441. The reversal of 442403423 is 324304244.

It is not a de Polignac number, because 442403423 - 2² = 442403419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442403392 and 442403401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442403473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17963 + ... + 34748.

It is an arithmetic number, because the mean of its divisors is an integer number (34789920).

Almost surely, 2^442403423 is an apocalyptic number.

442403423 is a deficient number, since it is larger than the sum of its proper divisors (114235297).

442403423 is a wasteful number, since it uses less digits than its factorization.

442403423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52838.

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

The square root of 442403423 is about 21033.3882910006. The cubic root of 442403423 is about 761.9728424037.

Adding to 442403423 its reverse (324304244), we get a palindrome (766707667).

The spelling of 442403423 in words is "four hundred forty-two million, four hundred three thousand, four hundred twenty-three".