402404212212 has 24 divisors (see below), whose sum is σ = 939260134176. Its totient is φ = 134089455648.

The previous prime is 402404212169. The next prime is 402404212261. The reversal of 402404212212 is 212212404204.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5623183 + ... + 5694294.

It is an arithmetic number, because the mean of its divisors is an integer number (39135838924).

Almost surely, 2^402404212212 is an apocalyptic number.

It is an amenable number.

402404212212 is an abundant number, since it is smaller than the sum of its proper divisors (536855921964).

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

402404212212 is a wasteful number, since it uses less digits than its factorization.

402404212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11320447 (or 11320445 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 402404212212 its reverse (212212404204), we get a palindrome (614616616416).

The spelling of 402404212212 in words is "four hundred two billion, four hundred four million, two hundred twelve thousand, two hundred twelve".