13023231440 has 80 divisors (see below), whose sum is σ = 31285664256. Its totient is φ = 5036428800.

The previous prime is 13023231439. The next prime is 13023231461. The reversal of 13023231440 is 4413232031.

13023231440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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 15 ways as a sum of consecutive naturals, for example, 3676070 + ... + 3679610.

Almost surely, 2^13023231440 is an apocalyptic number.

13023231440 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 13023231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15642832128).

13023231440 is an abundant number, since it is smaller than the sum of its proper divisors (18262432816).

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

13023231440 is a wasteful number, since it uses less digits than its factorization.

13023231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068 (or 5062 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 13023231440 its reverse (4413232031), we get a palindrome (17436463471).

The spelling of 13023231440 in words is "thirteen billion, twenty-three million, two hundred thirty-one thousand, four hundred forty".