39809085 has 16 divisors (see below), whose sum is σ = 67047360. Its totient is φ = 20113920.

The previous prime is 39809071. The next prime is 39809101. The reversal of 39809085 is 58090893.

It is not a de Polignac number, because 39809085 - 2⁴ = 39809069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69556 + ... + 70125.

It is an arithmetic number, because the mean of its divisors is an integer number (4190460).

Almost surely, 2^39809085 is an apocalyptic number.

It is an amenable number.

39809085 is a deficient number, since it is larger than the sum of its proper divisors (27238275).

39809085 is a wasteful number, since it uses less digits than its factorization.

39809085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139708.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 39809085 is about 6309.4441118057. Note that the first 3 decimals coincide. The cubic root of 39809085 is about 341.4502212957.

The spelling of 39809085 in words is "thirty-nine million, eight hundred nine thousand, eighty-five".