13839785 has 8 divisors (see below), whose sum is σ = 17584776. Its totient is φ = 10420480.

The previous prime is 13839737. The next prime is 13839797. The reversal of 13839785 is 58793831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2637376 + 11202409 = 1624^2 + 3347^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-13839785 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 81326 + ... + 81495.

It is an arithmetic number, because the mean of its divisors is an integer number (2198097).

Almost surely, 2^13839785 is an apocalyptic number.

It is an amenable number.

13839785 is a deficient number, since it is larger than the sum of its proper divisors (3744991).

13839785 is a wasteful number, since it uses less digits than its factorization.

13839785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162843.

The product of its digits is 181440, while the sum is 44.

The square root of 13839785 is about 3720.1861512564. The cubic root of 13839785 is about 240.0913136328.

The spelling of 13839785 in words is "thirteen million, eight hundred thirty-nine thousand, seven hundred eighty-five".