404809221 has 8 divisors (see below), whose sum is σ = 540529504. Its totient is φ = 269480880.

The previous prime is 404809217. The next prime is 404809247. The reversal of 404809221 is 122908404.

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

It is not a de Polignac number, because 404809221 - 2² = 404809217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404809211) 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, 95566 + ... + 99711.

It is an arithmetic number, because the mean of its divisors is an integer number (67566188).

Almost surely, 2^404809221 is an apocalyptic number.

It is an amenable number.

404809221 is a deficient number, since it is larger than the sum of its proper divisors (135720283).

404809221 is a wasteful number, since it uses less digits than its factorization.

404809221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195971.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 404809221 is about 20119.8712968051. The cubic root of 404809221 is about 739.7474308496.

The spelling of 404809221 in words is "four hundred four million, eight hundred nine thousand, two hundred twenty-one".