3989944900872 has 96 divisors (see below), whose sum is σ = 12519005316480. Its totient is φ = 1124368024320.

The previous prime is 3989944900847. The next prime is 3989944900891. The reversal of 3989944900872 is 2780094499893.

3989944900872 is a `hidden beast` number, since 3 + 98 + 99 + 449 + 0 + 0 + 8 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 3989944900872.

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 23 ways as a sum of consecutive naturals, for example, 54186204 + ... + 54259787.

It is an arithmetic number, because the mean of its divisors is an integer number (130406305380).

Almost surely, 2^{3989944900872} is an apocalyptic number.

It is an amenable number.

3989944900872 is an abundant number, since it is smaller than the sum of its proper divisors (8529060415608).

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

3989944900872 is a wasteful number, since it uses less digits than its factorization.

3989944900872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108446083 (or 108446076 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 3989944900872 in words is "three trillion, nine hundred eighty-nine billion, nine hundred forty-four million, nine hundred thousand, eight hundred seventy-two".