13216456 has 32 divisors (see below), whose sum is σ = 27319680. Its totient is φ = 5944000.

The previous prime is 13216433. The next prime is 13216477. The reversal of 13216456 is 65461231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8145 + ... + 9631.

It is an arithmetic number, because the mean of its divisors is an integer number (853740).

Almost surely, 2^13216456 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 13216456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13659840).

13216456 is an abundant number, since it is smaller than the sum of its proper divisors (14103224).

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

13216456 is a wasteful number, since it uses less digits than its factorization.

13216456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605 (or 1601 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 13216456 is about 3635.4444019954. Note that the first 4 decimals coincide. The cubic root of 13216456 is about 236.4313188637.

Adding to 13216456 its reverse (65461231), we get a palindrome (78677687).

It can be divided in two parts, 1321 and 6456, that added together give a palindrome (7777).

The spelling of 13216456 in words is "thirteen million, two hundred sixteen thousand, four hundred fifty-six".