423403011220 has 144 divisors (see below), whose sum is σ = 1038861936000. Its totient is φ = 144529980672.

The previous prime is 423403011197. The next prime is 423403011257. The reversal of 423403011220 is 22110304324.

It is a junction number, because it is equal to n+sod(n) for n = 423403011191 and 423403011200.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 344509566 + ... + 344510794.

It is an arithmetic number, because the mean of its divisors is an integer number (7214319000).

Almost surely, 2^423403011220 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 423403011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519430968000).

423403011220 is an abundant number, since it is smaller than the sum of its proper divisors (615458924780).

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

423403011220 is a wasteful number, since it uses less digits than its factorization.

423403011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510 (or 2501 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 423403011220 its reverse (22110304324), we get a palindrome (445513315544).

The spelling of 423403011220 in words is "four hundred twenty-three billion, four hundred three million, eleven thousand, two hundred twenty".