13489728 has 56 divisors (see below), whose sum is σ = 40794432. Its totient is φ = 3853824.

The previous prime is 13489699. The next prime is 13489733. The reversal of 13489728 is 82798431.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 13489728.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3675 + ... + 6362.

It is an arithmetic number, because the mean of its divisors is an integer number (728472).

Almost surely, 2^13489728 is an apocalyptic number.

It is an amenable number.

13489728 is an abundant number, since it is smaller than the sum of its proper divisors (27304704).

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

13489728 is a wasteful number, since it uses less digits than its factorization.

13489728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10059 (or 10049 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 13489728 is about 3672.8365060264. The cubic root of 13489728 is about 238.0497506805.

The spelling of 13489728 in words is "thirteen million, four hundred eighty-nine thousand, seven hundred twenty-eight".