13805985 has 8 divisors (see below), whose sum is σ = 22089600. Its totient is φ = 7363184.

The previous prime is 13805983. The next prime is 13806019. The reversal of 13805985 is 58950831.

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 13805985 - 2¹ = 13805983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13805983) 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 7 ways as a sum of consecutive naturals, for example, 460185 + ... + 460214.

It is an arithmetic number, because the mean of its divisors is an integer number (2761200).

Almost surely, 2^13805985 is an apocalyptic number.

13805985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13805985 is a deficient number, since it is larger than the sum of its proper divisors (8283615).

13805985 is an equidigital number, since it uses as much as digits as its factorization.

13805985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920407.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 13805985 is about 3715.6405907999. The cubic root of 13805985 is about 239.8957012084.

The spelling of 13805985 in words is "thirteen million, eight hundred five thousand, nine hundred eighty-five".