402404212 has 24 divisors (see below), whose sum is σ = 852151104. Its totient is φ = 162314112.

The previous prime is 402404201. The next prime is 402404221. The reversal of 402404212 is 212404204.

It is a self number, because there is not a number n which added to its sum of digits gives 402404212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422218 + ... + 423169.

It is an arithmetic number, because the mean of its divisors is an integer number (35506296).

Almost surely, 2^402404212 is an apocalyptic number.

It is an amenable number.

402404212 is an abundant number, since it is smaller than the sum of its proper divisors (449746892).

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

402404212 is a wasteful number, since it uses less digits than its factorization.

402404212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845415 (or 845413 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 402404212 is about 20060.0152542315. The cubic root of 402404212 is about 738.2795507751.

Adding to 402404212 its reverse (212404204), we get a palindrome (614808416).

The spelling of 402404212 in words is "four hundred two million, four hundred four thousand, two hundred twelve".