423312330 has 64 divisors (see below), whose sum is σ = 1171998720. Its totient is φ = 95847744.

The previous prime is 423312293. The next prime is 423312341. The reversal of 423312330 is 33213324.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 423312297 and 423312306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13051 + ... + 31889.

It is an arithmetic number, because the mean of its divisors is an integer number (18312480).

Almost surely, 2^423312330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423312330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585999360).

423312330 is an abundant number, since it is smaller than the sum of its proper divisors (748686390).

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

423312330 is a wasteful number, since it uses less digits than its factorization.

423312330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18963.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 423312330 is about 20574.5554022438. Note that the first 3 decimals coincide. The cubic root of 423312330 is about 750.8507856313.

Adding to 423312330 its reverse (33213324), we get a palindrome (456525654).

The spelling of 423312330 in words is "four hundred twenty-three million, three hundred twelve thousand, three hundred thirty".