39985071 has 32 divisors (see below), whose sum is σ = 66613248. Its totient is φ = 20805120.

The previous prime is 39985039. The next prime is 39985079. The reversal of 39985071 is 17058993.

It is a happy number.

It is not a de Polignac number, because 39985071 - 2⁵ = 39985039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39985079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9261 + ... + 12873.

It is an arithmetic number, because the mean of its divisors is an integer number (2081664).

Almost surely, 2^39985071 is an apocalyptic number.

39985071 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

39985071 is a deficient number, since it is larger than the sum of its proper divisors (26628177).

39985071 is a wasteful number, since it uses less digits than its factorization.

39985071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 39985071 is about 6323.3749691126. The cubic root of 39985071 is about 341.9526369895.

The spelling of 39985071 in words is "thirty-nine million, nine hundred eighty-five thousand, seventy-one".