13605728 has 24 divisors (see below), whose sum is σ = 26937288. Its totient is φ = 6764544.

The previous prime is 13605689. The next prime is 13605733. The reversal of 13605728 is 82750631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 13605694 and 13605703.

It is a congruent number.

It is an unprimeable number.

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, 5075 + ... + 7277.

It is an arithmetic number, because the mean of its divisors is an integer number (1122387).

Almost surely, 2^13605728 is an apocalyptic number.

It is an amenable number.

13605728 is a deficient number, since it is larger than the sum of its proper divisors (13331560).

13605728 is a wasteful number, since it uses less digits than its factorization.

13605728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 13605728 is about 3688.5943122008. The cubic root of 13605728 is about 238.7301448178.

The spelling of 13605728 in words is "thirteen million, six hundred five thousand, seven hundred twenty-eight".