13290728 has 32 divisors (see below), whose sum is σ = 28620000. Its totient is φ = 5722560.

The previous prime is 13290713. The next prime is 13290731. The reversal of 13290728 is 82709231.

13290728 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 = 13290694 and 13290703.

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, 2303 + ... + 5646.

It is an arithmetic number, because the mean of its divisors is an integer number (894375).

Almost surely, 2^13290728 is an apocalyptic number.

It is an amenable number.

13290728 is an abundant number, since it is smaller than the sum of its proper divisors (15329272).

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

13290728 is a wasteful number, since it uses less digits than its factorization.

13290728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985 (or 7981 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13290728 is about 3645.6450732346. The cubic root of 13290728 is about 236.8733797575.

Adding to 13290728 its reverse (82709231), we get a palindrome (95999959).

The spelling of 13290728 in words is "thirteen million, two hundred ninety thousand, seven hundred twenty-eight".