39638579922 has 54 divisors (see below), whose sum is σ = 86709513189. Its totient is φ = 13087001760.

The previous prime is 39638579921. The next prime is 39638579933. The reversal of 39638579922 is 22997583693.

39638579922 is a `hidden beast` number, since 3 + 9 + 6 + 38 + 579 + 9 + 22 = 666.

39638579922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38373283881 + 1265296041 = 195891^2 + 35571^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=140781.

It is a self number, because there is not a number n which added to its sum of digits gives 39638579922.

It is not an unprimeable number, because it can be changed into a prime (39638579921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 141062422 + ... + 141062702.

Almost surely, 2^39638579922 is an apocalyptic number.

39638579922 is an abundant number, since it is smaller than the sum of its proper divisors (47070933267).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39638579922 is an equidigital number, since it uses as much as digits as its factorization.

39638579922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 453 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 63.

The spelling of 39638579922 in words is "thirty-nine billion, six hundred thirty-eight million, five hundred seventy-nine thousand, nine hundred twenty-two".