13440140252 has 96 divisors (see below), whose sum is σ = 30841896960. Its totient is φ = 4968976320.

The previous prime is 13440140213. The next prime is 13440140261. The reversal of 13440140252 is 25204104431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 892199 + ... + 907137.

It is an arithmetic number, because the mean of its divisors is an integer number (321269760).

Almost surely, 2^13440140252 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 13440140252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15420948480).

13440140252 is an abundant number, since it is smaller than the sum of its proper divisors (17401756708).

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

13440140252 is a wasteful number, since it uses less digits than its factorization.

13440140252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111 (or 15109 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 13440140252 its reverse (25204104431), we get a palindrome (38644244683).

The spelling of 13440140252 in words is "thirteen billion, four hundred forty million, one hundred forty thousand, two hundred fifty-two".