13985728 has 14 divisors (see below), whose sum is σ = 27753056. Its totient is φ = 6992832.

The previous prime is 13985711. The next prime is 13985731. The reversal of 13985728 is 82758931.

13985728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109200 + ... + 109327.

Almost surely, 2^13985728 is an apocalyptic number.

It is an amenable number.

13985728 is a deficient number, since it is larger than the sum of its proper divisors (13767328).

13985728 is an equidigital number, since it uses as much as digits as its factorization.

13985728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218539 (or 218529 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 13985728 is about 3739.7497242463. The cubic root of 13985728 is about 240.9322996422.

The spelling of 13985728 in words is "thirteen million, nine hundred eighty-five thousand, seven hundred twenty-eight".