13681528 has 16 divisors (see below), whose sum is σ = 29317680. Its totient is φ = 5863488.

The previous prime is 13681513. The next prime is 13681529. The reversal of 13681528 is 82518631.

It is a junction number, because it is equal to n+sod(n) for n = 13681493 and 13681502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13681529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122101 + ... + 122212.

It is an arithmetic number, because the mean of its divisors is an integer number (1832355).

Almost surely, 2^13681528 is an apocalyptic number.

It is an amenable number.

13681528 is an abundant number, since it is smaller than the sum of its proper divisors (15636152).

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

13681528 is a wasteful number, since it uses less digits than its factorization.

13681528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244326 (or 244322 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 13681528 is about 3698.8549579566. The cubic root of 13681528 is about 239.1726604921.

The spelling of 13681528 in words is "thirteen million, six hundred eighty-one thousand, five hundred twenty-eight".