13280440320 has 832 divisors, whose sum is σ = 55861309440. Its totient is φ = 2930245632.

The previous prime is 13280440301. The next prime is 13280440321. The reversal of 13280440320 is 2304408231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13280440321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 181923804 + ... + 181923876.

Almost surely, 2^13280440320 is an apocalyptic number.

13280440320 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 13280440320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27930654720).

13280440320 is an abundant number, since it is smaller than the sum of its proper divisors (42580869120).

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

13280440320 is an equidigital number, since it uses as much as digits as its factorization.

13280440320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 13280440320 its reverse (2304408231), we get a palindrome (15584848551).

The spelling of 13280440320 in words is "thirteen billion, two hundred eighty million, four hundred forty thousand, three hundred twenty".