404409 has 8 divisors (see below), whose sum is σ = 562752. Its totient is φ = 257840.

The previous prime is 404399. The next prime is 404419. The reversal of 404409 is 904404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404399) and next prime (404419).

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

It is a cyclic number.

It is not a de Polignac number, because 404409 - 2¹¹ = 402361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404419) 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 7 ways as a sum of consecutive naturals, for example, 2862 + ... + 2999.

It is an arithmetic number, because the mean of its divisors is an integer number (70344).

2⁴⁰⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

404409 is a deficient number, since it is larger than the sum of its proper divisors (158343).

404409 is a wasteful number, since it uses less digits than its factorization.

404409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5887.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 404409 is about 635.9316000955. The cubic root of 404409 is about 73.9503562822.

The spelling of 404409 in words is "four hundred four thousand, four hundred nine".