13180728 has 32 divisors (see below), whose sum is σ = 35948160. Its totient is φ = 3994080.

The previous prime is 13180711. The next prime is 13180753. The reversal of 13180728 is 82708131.

It is a happy number.

13180728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13180695 and 13180704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24700 + ... + 25227.

It is an arithmetic number, because the mean of its divisors is an integer number (1123380).

Almost surely, 2^13180728 is an apocalyptic number.

It is an amenable number.

13180728 is an abundant number, since it is smaller than the sum of its proper divisors (22767432).

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

13180728 is a wasteful number, since it uses less digits than its factorization.

13180728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49947 (or 49943 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13180728 is about 3630.5272344385. The cubic root of 13180728 is about 236.2180786075.

Adding to 13180728 its reverse (82708131), we get a palindrome (95888859).

The spelling of 13180728 in words is "thirteen million, one hundred eighty thousand, seven hundred twenty-eight".