13280256 has 132 divisors (see below), whose sum is σ = 42151824. Its totient is φ = 3993600.

The previous prime is 13280237. The next prime is 13280257. The reversal of 13280256 is 65208231.

It is a tau number, because it is divible by the number of its divisors (132).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13280257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101311 + ... + 101441.

It is an arithmetic number, because the mean of its divisors is an integer number (319332).

Almost surely, 2^13280256 is an apocalyptic number.

13280256 is a gapful number since it is divisible by the number (16) 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 13280256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21075912).

13280256 is an abundant number, since it is smaller than the sum of its proper divisors (28871568).

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

13280256 is a wasteful number, since it uses less digits than its factorization.

13280256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 13280256 is about 3644.2085560516. The cubic root of 13280256 is about 236.8111511671.

Adding to 13280256 its reverse (65208231), we get a palindrome (78488487).

The spelling of 13280256 in words is "thirteen million, two hundred eighty thousand, two hundred fifty-six".