39878268872 has 36 divisors (see below), whose sum is σ = 80980774785. Its totient is φ = 18401965920.

The previous prime is 39878268853. The next prime is 39878268979. The reversal of 39878268872 is 27886287893.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 34097099716 + 5781169156 = 184654^2 + 76034^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=141206.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7339997 + ... + 7345427.

Almost surely, 2^39878268872 is an apocalyptic number.

It is an amenable number.

39878268872 is an abundant number, since it is smaller than the sum of its proper divisors (41102505913).

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

39878268872 is an frugal number, since it uses more digits than its factorization.

39878268872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10894 (or 5446 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 68.

The spelling of 39878268872 in words is "thirty-nine billion, eight hundred seventy-eight million, two hundred sixty-eight thousand, eight hundred seventy-two".