423221344 has 192 divisors, whose sum is σ = 1097349120. Its totient is φ = 156119040.

The previous prime is 423221327. The next prime is 423221347. The reversal of 423221344 is 443122324.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423221347) 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 31 ways as a sum of consecutive naturals, for example, 4755252 + ... + 4755340.

It is an arithmetic number, because the mean of its divisors is an integer number (5715360).

Almost surely, 2^423221344 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 423221344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548674560).

423221344 is an abundant number, since it is smaller than the sum of its proper divisors (674127776).

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

423221344 is a wasteful number, since it uses less digits than its factorization.

423221344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 205 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 423221344 is about 20572.3441542280. The cubic root of 423221344 is about 750.7969862653.

Adding to 423221344 its reverse (443122324), we get a palindrome (866343668).

The spelling of 423221344 in words is "four hundred twenty-three million, two hundred twenty-one thousand, three hundred forty-four".