39855438938 has 16 divisors (see below), whose sum is σ = 68616849600. Its totient is φ = 17007592416.

The previous prime is 39855438937. The next prime is 39855438947. The reversal of 39855438938 is 83983455893.

39855438938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (39855438937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6105788 + ... + 6112311.

It is an arithmetic number, because the mean of its divisors is an integer number (4288553100).

Almost surely, 2^39855438938 is an apocalyptic number.

39855438938 is a deficient number, since it is larger than the sum of its proper divisors (28761410662).

39855438938 is a wasteful number, since it uses less digits than its factorization.

39855438938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12218341.

The product of its digits is 111974400, while the sum is 65.

The spelling of 39855438938 in words is "thirty-nine billion, eight hundred fifty-five million, four hundred thirty-eight thousand, nine hundred thirty-eight".