423220434 has 64 divisors (see below), whose sum is σ = 1045228800. Its totient is φ = 111248640.

The previous prime is 423220411. The next prime is 423220451. The reversal of 423220434 is 434022324.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189444 + ... + 191664.

It is an arithmetic number, because the mean of its divisors is an integer number (16331700).

Almost surely, 2^423220434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423220434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522614400).

423220434 is an abundant number, since it is smaller than the sum of its proper divisors (622008366).

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

423220434 is a wasteful number, since it uses less digits than its factorization.

423220434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 423220434 is about 20572.3220371450. The cubic root of 423220434 is about 750.7964481500.

Adding to 423220434 its reverse (434022324), we get a palindrome (857242758).

The spelling of 423220434 in words is "four hundred twenty-three million, two hundred twenty thousand, four hundred thirty-four".