39981940086 has 32 divisors (see below), whose sum is σ = 87245308800. Its totient is φ = 12114074880.

The previous prime is 39981940079. The next prime is 39981940121. The reversal of 39981940086 is 68004918993.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494310 + ... + 569478.

It is an arithmetic number, because the mean of its divisors is an integer number (2726415900).

Almost surely, 2^39981940086 is an apocalyptic number.

39981940086 is an abundant number, since it is smaller than the sum of its proper divisors (47263368714).

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

39981940086 is a wasteful number, since it uses less digits than its factorization.

39981940086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83244.

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 39981940086 in words is "thirty-nine billion, nine hundred eighty-one million, nine hundred forty thousand, eighty-six".