423344400220 has 96 divisors (see below), whose sum is σ = 1035922124160. Its totient is φ = 142331904000.

The previous prime is 423344400217. The next prime is 423344400223. The reversal of 423344400220 is 22004443324.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (423344400217) and next prime (423344400223).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423344400223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1337220 + ... + 1623220.

It is an arithmetic number, because the mean of its divisors is an integer number (10790855460).

Almost surely, 2^423344400220 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 423344400220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517961062080).

423344400220 is an abundant number, since it is smaller than the sum of its proper divisors (612577723940).

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

423344400220 is a wasteful number, since it uses less digits than its factorization.

423344400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286223 (or 286221 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 423344400220 its reverse (22004443324), we get a palindrome (445348843544).

The spelling of 423344400220 in words is "four hundred twenty-three billion, three hundred forty-four million, four hundred thousand, two hundred twenty".