39986507 has 12 divisors (see below), whose sum is σ = 46268040. Its totient is φ = 34436160.

The previous prime is 39986501. The next prime is 39986591. The reversal of 39986507 is 70568993.

It is not a de Polignac number, because 39986507 - 2¹⁶ = 39920971 is a prime.

It is a super-2 number, since 2×39986507² = 3197841484122098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39986501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6398 + ... + 10995.

It is an arithmetic number, because the mean of its divisors is an integer number (3855670).

Almost surely, 2^39986507 is an apocalyptic number.

39986507 is a deficient number, since it is larger than the sum of its proper divisors (6281533).

39986507 is a wasteful number, since it uses less digits than its factorization.

39986507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17434 (or 17423 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 39986507 is about 6323.4885150524. The cubic root of 39986507 is about 341.9567305016.

The spelling of 39986507 in words is "thirty-nine million, nine hundred eighty-six thousand, five hundred seven".