13860665 has 32 divisors (see below), whose sum is σ = 20998656. Its totient is φ = 8547840.

The previous prime is 13860659. The next prime is 13860667. The reversal of 13860665 is 56606831.

It is a de Polignac number, because none of the positive numbers 2^k-13860665 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (13860667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18284 + ... + 19026.

It is an arithmetic number, because the mean of its divisors is an integer number (656208).

Almost surely, 2^13860665 is an apocalyptic number.

It is an amenable number.

13860665 is a deficient number, since it is larger than the sum of its proper divisors (7137991).

13860665 is a wasteful number, since it uses less digits than its factorization.

13860665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 13860665 is about 3722.9914047712. The cubic root of 13860665 is about 240.2119944011.

The spelling of 13860665 in words is "thirteen million, eight hundred sixty thousand, six hundred sixty-five".