423320402440 has 64 divisors (see below), whose sum is σ = 1025945948160. Its totient is φ = 156271215360.

The previous prime is 423320402423. The next prime is 423320402507. The reversal of 423320402440 is 44204023324.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 423320402399 and 423320402408.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2565225 + ... + 2725255.

It is an arithmetic number, because the mean of its divisors is an integer number (16030405440).

Almost surely, 2^423320402440 is an apocalyptic number.

423320402440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423320402440 is an abundant number, since it is smaller than the sum of its proper divisors (602625545720).

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

423320402440 is a wasteful number, since it uses less digits than its factorization.

423320402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165142 (or 165138 counting only the distinct ones).

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

Adding to 423320402440 its reverse (44204023324), we get a palindrome (467524425764).

The spelling of 423320402440 in words is "four hundred twenty-three billion, three hundred twenty million, four hundred two thousand, four hundred forty".