423321420 has 72 divisors (see below), whose sum is σ = 1259176464. Its totient is φ = 106241024.

The previous prime is 423321377. The next prime is 423321443. The reversal of 423321420 is 24123324.

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 23 ways as a sum of consecutive naturals, for example, 5134 + ... + 29546.

It is an arithmetic number, because the mean of its divisors is an integer number (17488562).

Almost surely, 2^423321420 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 423321420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629588232).

423321420 is an abundant number, since it is smaller than the sum of its proper divisors (835855044).

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

423321420 is a wasteful number, since it uses less digits than its factorization.

423321420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24459 (or 24440 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 423321420 is about 20574.7763049808. The cubic root of 423321420 is about 750.8561600592.

Adding to 423321420 its reverse (24123324), we get a palindrome (447444744).

The spelling of 423321420 in words is "four hundred twenty-three million, three hundred twenty-one thousand, four hundred twenty".