3998987876 has 12 divisors (see below), whose sum is σ = 7536554172. Its totient is φ = 1845686688.

The previous prime is 3998987873. The next prime is 3998987899. The reversal of 3998987876 is 6787898993.

It can be written as a sum of positive squares in 2 ways, for example, as 997043776 + 3001944100 = 31576^2 + 54790^2 .

It is not an unprimeable number, because it can be changed into a prime (3998987873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38451755 + ... + 38451858.

It is an arithmetic number, because the mean of its divisors is an integer number (628046181).

Almost surely, 2^3998987876 is an apocalyptic number.

It is an amenable number.

3998987876 is a deficient number, since it is larger than the sum of its proper divisors (3537566296).

3998987876 is a wasteful number, since it uses less digits than its factorization.

3998987876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76903630 (or 76903628 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 74.

The square root of 3998987876 is about 63237.5511543576. The cubic root of 3998987876 is about 1587.2671534489.

The spelling of 3998987876 in words is "three billion, nine hundred ninety-eight million, nine hundred eighty-seven thousand, eight hundred seventy-six".