404144023 has 4 divisors (see below), whose sum is σ = 412742880. Its totient is φ = 395545168.

The previous prime is 404143991. The next prime is 404144033. The reversal of 404144023 is 320441404.

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 404144023 - 2⁵ = 404143991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404143985 and 404144003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404144033) 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 3 ways as a sum of consecutive naturals, for example, 4299358 + ... + 4299451.

It is an arithmetic number, because the mean of its divisors is an integer number (103185720).

Almost surely, 2^404144023 is an apocalyptic number.

404144023 is a deficient number, since it is larger than the sum of its proper divisors (8598857).

404144023 is an equidigital number, since it uses as much as digits as its factorization.

404144023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8598856.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 404144023 is about 20103.3336290278. Note that the first 3 decimals coincide. The cubic root of 404144023 is about 739.3420149431.

Adding to 404144023 its reverse (320441404), we get a palindrome (724585427).

The spelling of 404144023 in words is "four hundred four million, one hundred forty-four thousand, twenty-three".