404456009 has 4 divisors (see below), whose sum is σ = 413061504. Its totient is φ = 395850516.

The previous prime is 404455999. The next prime is 404456023. The reversal of 404456009 is 900654404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404456009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404456029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4302677 + ... + 4302770.

It is an arithmetic number, because the mean of its divisors is an integer number (103265376).

Almost surely, 2^404456009 is an apocalyptic number.

It is an amenable number.

404456009 is a deficient number, since it is larger than the sum of its proper divisors (8605495).

404456009 is an equidigital number, since it uses as much as digits as its factorization.

404456009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8605494.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 404456009 is about 20111.0916909053. The cubic root of 404456009 is about 739.5322153131.

The spelling of 404456009 in words is "four hundred four million, four hundred fifty-six thousand, nine".