404323421 has 16 divisors (see below), whose sum is σ = 425103360. Its totient is φ = 384082560.

The previous prime is 404323369. The next prime is 404323441. The reversal of 404323421 is 124323404.

It is not a de Polignac number, because 404323421 - 2⁶ = 404323357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404323441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843860 + ... + 844338.

It is an arithmetic number, because the mean of its divisors is an integer number (26568960).

Almost surely, 2^404323421 is an apocalyptic number.

It is an amenable number.

404323421 is a deficient number, since it is larger than the sum of its proper divisors (20779939).

404323421 is a wasteful number, since it uses less digits than its factorization.

404323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 404323421 is about 20107.7950307835. The cubic root of 404323421 is about 739.4513957994.

Adding to 404323421 its reverse (124323404), we get a palindrome (528646825).

The spelling of 404323421 in words is "four hundred four million, three hundred twenty-three thousand, four hundred twenty-one".