39985065 has 12 divisors (see below), whose sum is σ = 69307524. Its totient is φ = 21325344.

The previous prime is 39985039. The next prime is 39985079. The reversal of 39985065 is 56058993.

39985065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4272489 + 35712576 = 2067^2 + 5976^2 .

It is not a de Polignac number, because 39985065 - 2¹⁰ = 39984041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 888557 = 39985065 / (3 + 9 + 9 + 8 + 5 + 0 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 39985065.

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 11 ways as a sum of consecutive naturals, for example, 444234 + ... + 444323.

It is an arithmetic number, because the mean of its divisors is an integer number (5775627).

Almost surely, 2^39985065 is an apocalyptic number.

It is an amenable number.

39985065 is a deficient number, since it is larger than the sum of its proper divisors (29322459).

39985065 is a wasteful number, since it uses less digits than its factorization.

39985065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888568 (or 888565 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 39985065 is about 6323.3744946824. The cubic root of 39985065 is about 341.9526198855.

The spelling of 39985065 in words is "thirty-nine million, nine hundred eighty-five thousand, sixty-five".