13971128 has 16 divisors (see below), whose sum is σ = 26456760. Its totient is φ = 6916000.

The previous prime is 13971121. The next prime is 13971149. The reversal of 13971128 is 82117931.

It is a junction number, because it is equal to n+sod(n) for n = 13971094 and 13971103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13971121) by changing a digit.

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, 7838 + ... + 9453.

Almost surely, 2^13971128 is an apocalyptic number.

It is an amenable number.

13971128 is a deficient number, since it is larger than the sum of its proper divisors (12485632).

13971128 is a wasteful number, since it uses less digits than its factorization.

13971128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17398 (or 17394 counting only the distinct ones).

The product of its digits is 3024, while the sum is 32.

The square root of 13971128 is about 3737.7972122629. The cubic root of 13971128 is about 240.8484323283.

The spelling of 13971128 in words is "thirteen million, nine hundred seventy-one thousand, one hundred twenty-eight".