3987918872 has 64 divisors (see below), whose sum is σ = 8639447040. Its totient is φ = 1690416000.

The previous prime is 3987918829. The next prime is 3987918953. The reversal of 3987918872 is 2788197893.

It is a congruent number.

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, 3064622 + ... + 3065922.

It is an arithmetic number, because the mean of its divisors is an integer number (134991360).

Almost surely, 2^3987918872 is an apocalyptic number.

It is an amenable number.

3987918872 is an abundant number, since it is smaller than the sum of its proper divisors (4651528168).

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

3987918872 is a wasteful number, since it uses less digits than its factorization.

3987918872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872 (or 1868 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 62.

The square root of 3987918872 is about 63149.9712747361. The cubic root of 3987918872 is about 1585.8013073843.

The spelling of 3987918872 in words is "three billion, nine hundred eighty-seven million, nine hundred eighteen thousand, eight hundred seventy-two".