423330023440 has 80 divisors (see below), whose sum is σ = 992355235200. Its totient is φ = 167940792320.

The previous prime is 423330023423. The next prime is 423330023503. The reversal of 423330023440 is 44320033324.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 423330023399 and 423330023408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5963355 + ... + 6033925.

It is an arithmetic number, because the mean of its divisors is an integer number (12404440440).

Almost surely, 2^423330023440 is an apocalyptic number.

423330023440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423330023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496177617600).

423330023440 is an abundant number, since it is smaller than the sum of its proper divisors (569025211760).

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

423330023440 is a wasteful number, since it uses less digits than its factorization.

423330023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71200 (or 71194 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 28.

Adding to 423330023440 its reverse (44320033324), we get a palindrome (467650056764).

The spelling of 423330023440 in words is "four hundred twenty-three billion, three hundred thirty million, twenty-three thousand, four hundred forty".