13086728 has 12 divisors (see below), whose sum is σ = 24556815. Its totient is φ = 6538248.

The previous prime is 13086713. The next prime is 13086737. The reversal of 13086728 is 82768031.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 6543364 + 6543364 = 2558^2 + 2558^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2558.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9593 + ... + 10871.

Almost surely, 2^13086728 is an apocalyptic number.

It is an amenable number.

13086728 is a deficient number, since it is larger than the sum of its proper divisors (11470087).

13086728 is an frugal number, since it uses more digits than its factorization.

13086728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 13086728 is about 3617.5582925504. The cubic root of 13086728 is about 235.6551988678.

The spelling of 13086728 in words is "thirteen million, eighty-six thousand, seven hundred twenty-eight".