13128684 has 12 divisors (see below), whose sum is σ = 30633624. Its totient is φ = 4376224.

The previous prime is 13128667. The next prime is 13128701. The reversal of 13128684 is 48682131.

13128684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13128667) and next prime (13128701).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547017 + ... + 547040.

It is an arithmetic number, because the mean of its divisors is an integer number (2552802).

Almost surely, 2^13128684 is an apocalyptic number.

It is an amenable number.

13128684 is an abundant number, since it is smaller than the sum of its proper divisors (17504940).

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

13128684 is a wasteful number, since it uses less digits than its factorization.

13128684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094064 (or 1094062 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 13128684 is about 3623.3525911785. The cubic root of 13128684 is about 235.9067667730.

The spelling of 13128684 in words is "thirteen million, one hundred twenty-eight thousand, six hundred eighty-four".