13040402232 has 128 divisors (see below), whose sum is σ = 38371656960. Its totient is φ = 3640888320.

The previous prime is 13040402213. The next prime is 13040402237. The reversal of 13040402232 is 23220404031.

It is a junction number, because it is equal to n+sod(n) for n = 13040402199 and 13040402208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13040402237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2011348 + ... + 2017820.

It is an arithmetic number, because the mean of its divisors is an integer number (299778570).

Almost surely, 2^13040402232 is an apocalyptic number.

13040402232 is a gapful number since it is divisible by the number (12) 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 13040402232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19185828480).

13040402232 is an abundant number, since it is smaller than the sum of its proper divisors (25331254728).

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

13040402232 is a wasteful number, since it uses less digits than its factorization.

13040402232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093 (or 7089 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 13040402232 its reverse (23220404031), we get a palindrome (36260806263).

The spelling of 13040402232 in words is "thirteen billion, forty million, four hundred two thousand, two hundred thirty-two".