39868538 has 8 divisors (see below), whose sum is σ = 60395220. Its totient is φ = 19736800.

The previous prime is 39868531. The next prime is 39868571. The reversal of 39868538 is 83586893.

It can be written as a sum of positive squares in 2 ways, for example, as 30547729 + 9320809 = 5527^2 + 3053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (39868531) 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 3 ways as a sum of consecutive naturals, for example, 98483 + ... + 98886.

Almost surely, 2^39868538 is an apocalyptic number.

39868538 is a deficient number, since it is larger than the sum of its proper divisors (20526682).

39868538 is a wasteful number, since it uses less digits than its factorization.

39868538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197472.

The product of its digits is 1244160, while the sum is 50.

The square root of 39868538 is about 6314.1537833664. The cubic root of 39868538 is about 341.6201167066.

The spelling of 39868538 in words is "thirty-nine million, eight hundred sixty-eight thousand, five hundred thirty-eight".