404442023 has 4 divisors (see below), whose sum is σ = 404848680. Its totient is φ = 404035368.

The previous prime is 404442013. The next prime is 404442187. The reversal of 404442023 is 320244404.

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

It is a cyclic number.

It is not a de Polignac number, because 404442023 - 2¹² = 404437927 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 404442023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404442013) 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, 201833 + ... + 203826.

It is an arithmetic number, because the mean of its divisors is an integer number (101212170).

Almost surely, 2^404442023 is an apocalyptic number.

404442023 is a deficient number, since it is larger than the sum of its proper divisors (406657).

404442023 is an equidigital number, since it uses as much as digits as its factorization.

404442023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406656.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 404442023 is about 20110.7439693314. The cubic root of 404442023 is about 739.5236909276.

Adding to 404442023 its reverse (320244404), we get a palindrome (724686427).

The spelling of 404442023 in words is "four hundred four million, four hundred forty-two thousand, twenty-three".