13749128 has 16 divisors (see below), whose sum is σ = 25879500. Its totient is φ = 6847936.

The previous prime is 13749119. The next prime is 13749133. The reversal of 13749128 is 82194731.

It can be written as a sum of positive squares in 2 ways, for example, as 8988004 + 4761124 = 2998^2 + 2182^2 .

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 3 ways as a sum of consecutive naturals, for example, 1043 + ... + 5346.

Almost surely, 2^13749128 is an apocalyptic number.

It is an amenable number.

13749128 is a deficient number, since it is larger than the sum of its proper divisors (12130372).

13749128 is a wasteful number, since it uses less digits than its factorization.

13749128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664 (or 6660 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 13749128 is about 3707.9816612276. The cubic root of 13749128 is about 239.5659283605.

The spelling of 13749128 in words is "thirteen million, seven hundred forty-nine thousand, one hundred twenty-eight".