13728811 has 8 divisors (see below), whose sum is σ = 14528000. Its totient is φ = 12937320.

The previous prime is 13728797. The next prime is 13728821. The reversal of 13728811 is 11882731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13728811 - 2¹⁵ = 13696043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13728821) 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 7 ways as a sum of consecutive naturals, for example, 1966 + ... + 5596.

It is an arithmetic number, because the mean of its divisors is an integer number (1816000).

Almost surely, 2^13728811 is an apocalyptic number.

13728811 is a deficient number, since it is larger than the sum of its proper divisors (799189).

13728811 is a wasteful number, since it uses less digits than its factorization.

13728811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849.

The product of its digits is 2688, while the sum is 31.

The square root of 13728811 is about 3705.2410178017. The cubic root of 13728811 is about 239.4478685006.

The spelling of 13728811 in words is "thirteen million, seven hundred twenty-eight thousand, eight hundred eleven".