13111648 has 36 divisors (see below), whose sum is σ = 28306908. Its totient is φ = 5928960.

The previous prime is 13111643. The next prime is 13111649. The reversal of 13111648 is 84611131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111643) 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 5 ways as a sum of consecutive naturals, for example, 67840 + ... + 68032.

It is an arithmetic number, because the mean of its divisors is an integer number (786303).

Almost surely, 2^13111648 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 13111648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14153454).

13111648 is an abundant number, since it is smaller than the sum of its proper divisors (15195260).

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

13111648 is an equidigital number, since it uses as much as digits as its factorization.

13111648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 206 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 13111648 is about 3621.0009665837. Note that the first 3 decimals coincide. The cubic root of 13111648 is about 235.8046837496.

Adding to 13111648 its reverse (84611131), we get a palindrome (97722779).

The spelling of 13111648 in words is "thirteen million, one hundred eleven thousand, six hundred forty-eight".