402322228 has 24 divisors (see below), whose sum is σ = 877794624. Its totient is φ = 156748800.

The previous prime is 402322171. The next prime is 402322229. The reversal of 402322228 is 822223204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402322229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652813 + ... + 653428.

It is an arithmetic number, because the mean of its divisors is an integer number (36574776).

Almost surely, 2^402322228 is an apocalyptic number.

It is an amenable number.

402322228 is an abundant number, since it is smaller than the sum of its proper divisors (475472396).

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

402322228 is a wasteful number, since it uses less digits than its factorization.

402322228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306263 (or 1306261 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 402322228 is about 20057.9716821019. The cubic root of 402322228 is about 738.2294094662.

The spelling of 402322228 in words is "four hundred two million, three hundred twenty-two thousand, two hundred twenty-eight".