404424321 has 8 divisors (see below), whose sum is σ = 616265664. Its totient is φ = 231099600.

The previous prime is 404424313. The next prime is 404424323. The reversal of 404424321 is 123424404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 404424321 - 2³ = 404424313 is a prime.

It is a super-2 number, since 2×404424321² = 327118062832622082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 404424291 and 404424300.

It is not an unprimeable number, because it can be changed into a prime (404424323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9629130 + ... + 9629171.

It is an arithmetic number, because the mean of its divisors is an integer number (77033208).

Almost surely, 2^404424321 is an apocalyptic number.

It is an amenable number.

404424321 is a deficient number, since it is larger than the sum of its proper divisors (211841343).

404424321 is a wasteful number, since it uses less digits than its factorization.

404424321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19258311.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 404424321 is about 20110.3038515086. The cubic root of 404424321 is about 739.5129013800.

Adding to 404424321 its reverse (123424404), we get a palindrome (527848725).

The spelling of 404424321 in words is "four hundred four million, four hundred twenty-four thousand, three hundred twenty-one".