404805 has 8 divisors (see below), whose sum is σ = 647712. Its totient is φ = 215888.

The previous prime is 404783. The next prime is 404819. The reversal of 404805 is 508404.

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 404805 - 2⁵ = 404773 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13479 + ... + 13508.

It is an arithmetic number, because the mean of its divisors is an integer number (80964).

2⁴⁰⁴⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

404805 is a deficient number, since it is larger than the sum of its proper divisors (242907).

404805 is a wasteful number, since it uses less digits than its factorization.

404805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26995.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 404805 is about 636.2428781527. The cubic root of 404805 is about 73.9744859692.

The spelling of 404805 in words is "four hundred four thousand, eight hundred five".