404435023 has 4 divisors (see below), whose sum is σ = 408014208. Its totient is φ = 400855840.

The previous prime is 404435011. The next prime is 404435027. The reversal of 404435023 is 320534404.

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 404435023 - 2¹⁷ = 404303951 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 (404435027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789423 + ... + 1789648.

It is an arithmetic number, because the mean of its divisors is an integer number (102003552).

Almost surely, 2^404435023 is an apocalyptic number.

404435023 is a deficient number, since it is larger than the sum of its proper divisors (3579185).

404435023 is a wasteful number, since it uses less digits than its factorization.

404435023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579184.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 404435023 is about 20110.5699322520. The cubic root of 404435023 is about 739.5194243946.

Adding to 404435023 its reverse (320534404), we get a palindrome (724969427).

The spelling of 404435023 in words is "four hundred four million, four hundred thirty-five thousand, twenty-three".