423040443 has 32 divisors (see below), whose sum is σ = 661893120. Its totient is φ = 235345440.

The previous prime is 423040433. The next prime is 423040447. The reversal of 423040443 is 344040324.

It is a happy number.

It is not a de Polignac number, because 423040443 - 2⁵ = 423040411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423040447) 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 31 ways as a sum of consecutive naturals, for example, 130978 + ... + 134168.

It is an arithmetic number, because the mean of its divisors is an integer number (20684160).

Almost surely, 2^423040443 is an apocalyptic number.

423040443 is a deficient number, since it is larger than the sum of its proper divisors (238852677).

423040443 is a wasteful number, since it uses less digits than its factorization.

423040443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 423040443 is about 20567.9469806785. The cubic root of 423040443 is about 750.6899978981.

Adding to 423040443 its reverse (344040324), we get a palindrome (767080767).

The spelling of 423040443 in words is "four hundred twenty-three million, forty thousand, four hundred forty-three".