404212005 has 96 divisors (see below), whose sum is σ = 787449600. Its totient is φ = 196124544.

The previous prime is 404212001. The next prime is 404212019. The reversal of 404212005 is 500212404.

404212005 is a `hidden beast` number, since 40 + 421 + 200 + 5 = 666.

It is not a de Polignac number, because 404212005 - 2² = 404212001 is a prime.

It is a super-2 number, since 2×404212005² = 326774689972240050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404212001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6032982 + ... + 6033048.

It is an arithmetic number, because the mean of its divisors is an integer number (8202600).

Almost surely, 2^404212005 is an apocalyptic number.

404212005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404212005 is a deficient number, since it is larger than the sum of its proper divisors (383237595).

404212005 is a wasteful number, since it uses less digits than its factorization.

404212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 404212005 is about 20105.0243720320. The cubic root of 404212005 is about 739.3834680951.

Adding to 404212005 its reverse (500212404), we get a palindrome (904424409).

The spelling of 404212005 in words is "four hundred four million, two hundred twelve thousand, five".