13087928 has 16 divisors (see below), whose sum is σ = 28045680. Its totient is φ = 5609088.

The previous prime is 13087913. The next prime is 13087931. The reversal of 13087928 is 82978031.

It is a junction number, because it is equal to n+sod(n) for n = 13087891 and 13087900.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 116801 + ... + 116912.

It is an arithmetic number, because the mean of its divisors is an integer number (1752855).

Almost surely, 2^13087928 is an apocalyptic number.

It is an amenable number.

13087928 is an abundant number, since it is smaller than the sum of its proper divisors (14957752).

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

13087928 is a wasteful number, since it uses less digits than its factorization.

13087928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233726 (or 233722 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 13087928 is about 3617.7241464766. The cubic root of 13087928 is about 235.6624015236.

The spelling of 13087928 in words is "thirteen million, eighty-seven thousand, nine hundred twenty-eight".