404212212 has 72 divisors (see below), whose sum is σ = 1091073984. Its totient is φ = 125870976.

The previous prime is 404212177. The next prime is 404212223. The reversal of 404212212 is 212212404.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29928 + ... + 41280.

Almost surely, 2^404212212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545536992).

404212212 is an abundant number, since it is smaller than the sum of its proper divisors (686861772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404212212 is a wasteful number, since it uses less digits than its factorization.

404212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11429 (or 11424 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 404212212 is about 20105.0295199982. The cubic root of 404212212 is about 739.3835943097.

Adding to 404212212 its reverse (212212404), we get a palindrome (616424616).

The spelling of 404212212 in words is "four hundred four million, two hundred twelve thousand, two hundred twelve".