3989387442880 has 448 divisors, whose sum is σ = 11603563361280. Its totient is φ = 1277774217216.

The previous prime is 3989387442871. The next prime is 3989387442883. The reversal of 3989387442880 is 882447839893.

It is a tau number, because it is divible by the number of its divisors (448).

It is a hoax number, since the sum of its digits (73) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3989387442883) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 210257074 + ... + 210276046.

Almost surely, 2^{3989387442880} 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 3989387442880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5801781680640).

3989387442880 is an abundant number, since it is smaller than the sum of its proper divisors (7614175918400).

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

3989387442880 is a wasteful number, since it uses less digits than its factorization.

3989387442880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19136 (or 19126 counting only the distinct ones).

The product of its (nonzero) digits is 668860416, while the sum is 73.

The spelling of 3989387442880 in words is "three trillion, nine hundred eighty-nine billion, three hundred eighty-seven million, four hundred forty-two thousand, eight hundred eighty".