13978128 has 40 divisors (see below), whose sum is σ = 36410368. Its totient is φ = 4620672.

The previous prime is 13978127. The next prime is 13978147. The reversal of 13978128 is 82187931.

It is not an unprimeable number, because it can be changed into a prime (13978123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4950 + ... + 7242.

Almost surely, 2^13978128 is an apocalyptic number.

It is an amenable number.

13978128 is an abundant number, since it is smaller than the sum of its proper divisors (22432240).

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

13978128 is a wasteful number, since it uses less digits than its factorization.

13978128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431 (or 2425 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 13978128 is about 3738.7334753898. The cubic root of 13978128 is about 240.8886499717. Note that the first 3 decimals are identical.

The spelling of 13978128 in words is "thirteen million, nine hundred seventy-eight thousand, one hundred twenty-eight".