39999385 has 16 divisors (see below), whose sum is σ = 51152256. Its totient is φ = 29922048.

The previous prime is 39999353. The next prime is 39999391. The reversal of 39999385 is 58399993.

39999385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 39999385 - 2⁵ = 39999353 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 15 ways as a sum of consecutive naturals, for example, 12412 + ... + 15298.

It is an arithmetic number, because the mean of its divisors is an integer number (3197016).

Almost surely, 2^39999385 is an apocalyptic number.

It is an amenable number.

39999385 is a deficient number, since it is larger than the sum of its proper divisors (11152871).

39999385 is a wasteful number, since it uses less digits than its factorization.

39999385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072.

The product of its digits is 2361960, while the sum is 55.

The square root of 39999385 is about 6324.5067001308. The cubic root of 39999385 is about 341.9934366010.

The spelling of 39999385 in words is "thirty-nine million, nine hundred ninety-nine thousand, three hundred eighty-five".