13611728 has 40 divisors (see below), whose sum is σ = 29331456. Its totient is φ = 6076800.

The previous prime is 13611721. The next prime is 13611739. The reversal of 13611728 is 82711631.

It is a self number, because there is not a number n which added to its sum of digits gives 13611728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13611721) 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 7 ways as a sum of consecutive naturals, for example, 5393 + ... + 7503.

Almost surely, 2^13611728 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 13611728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14665728).

13611728 is an abundant number, since it is smaller than the sum of its proper divisors (15719728).

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

13611728 is a wasteful number, since it uses less digits than its factorization.

13611728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163 (or 2157 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 13611728 is about 3689.4075405138. The cubic root of 13611728 is about 238.7652322546.

The spelling of 13611728 in words is "thirteen million, six hundred eleven thousand, seven hundred twenty-eight".