123323443440 has 160 divisors (see below), whose sum is σ = 385542395136. Its totient is φ = 32608143360.

The previous prime is 123323443429. The next prime is 123323443459. The reversal of 123323443440 is 44344323321.

It is a happy number.

123323443440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 38500879 + ... + 38504081.

Almost surely, 2^123323443440 is an apocalyptic number.

123323443440 is a gapful number since it is divisible by the number (10) 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 123323443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192771197568).

123323443440 is an abundant number, since it is smaller than the sum of its proper divisors (262218951696).

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

123323443440 is a wasteful number, since it uses less digits than its factorization.

123323443440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527 (or 4521 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 123323443440 its reverse (44344323321), we get a palindrome (167667766761).

The spelling of 123323443440 in words is "one hundred twenty-three billion, three hundred twenty-three million, four hundred forty-three thousand, four hundred forty".