404910005 has 6 divisors (see below), whose sum is σ = 485946006. Its totient is φ = 323892008.

The previous prime is 404910001. The next prime is 404910017. The reversal of 404910005 is 500019404.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 323928004 + 80982001 = 17998^2 + 8999^2 .

It is not a de Polignac number, because 404910005 - 2² = 404910001 is a prime.

It is a super-2 number, since 2×404910005² = 327904224298200050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404910001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40496 + ... + 49494.

It is an arithmetic number, because the mean of its divisors is an integer number (80991001).

Almost surely, 2^404910005 is an apocalyptic number.

It is an amenable number.

404910005 is a deficient number, since it is larger than the sum of its proper divisors (81036001).

404910005 is an frugal number, since it uses more digits than its factorization.

404910005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18003 (or 9004 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 404910005 is about 20122.3757295206. The cubic root of 404910005 is about 739.8088165714.

Multiplying 404910005 by its product of nonzero digits (720), we get a square (291535203600 = 539940²).

Adding to 404910005 its reverse (500019404), we get a palindrome (904929409).

The spelling of 404910005 in words is "four hundred four million, nine hundred ten thousand, five".