13681648 has 20 divisors (see below), whose sum is σ = 26647600. Its totient is φ = 6804864.

The previous prime is 13681643. The next prime is 13681663. The reversal of 13681648 is 84618631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13681643) by changing a digit.

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, 1036 + ... + 5332.

It is an arithmetic number, because the mean of its divisors is an integer number (1332380).

Almost surely, 2^13681648 is an apocalyptic number.

It is an amenable number.

13681648 is a deficient number, since it is larger than the sum of its proper divisors (12965952).

13681648 is a wasteful number, since it uses less digits than its factorization.

13681648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504 (or 4498 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 13681648 is about 3698.8711791572. The cubic root of 13681648 is about 239.1733597472.

The spelling of 13681648 in words is "thirteen million, six hundred eighty-one thousand, six hundred forty-eight".