39986435488 has 96 divisors (see below), whose sum is σ = 85075174800. Its totient is φ = 18432589824.

The previous prime is 39986435477. The next prime is 39986435513. The reversal of 39986435488 is 88453468993.

It can be written as a sum of positive squares in 8 ways, for example, as 9748007824 + 30238427664 = 98732^2 + 173892^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5273556 + ... + 5281132.

Almost surely, 2^39986435488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39986435488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42537587400).

39986435488 is an abundant number, since it is smaller than the sum of its proper divisors (45088739312).

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

39986435488 is a wasteful number, since it uses less digits than its factorization.

39986435488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7802 (or 7794 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 67.

The spelling of 39986435488 in words is "thirty-nine billion, nine hundred eighty-six million, four hundred thirty-five thousand, four hundred eighty-eight".