3991914988 has 12 divisors (see below), whose sum is σ = 7028710360. Its totient is φ = 1983712032.

The previous prime is 3991914977. The next prime is 3991915001. The reversal of 3991914988 is 8894191993.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3060633 + ... + 3061936.

Almost surely, 2^3991914988 is an apocalyptic number.

It is an amenable number.

3991914988 is a deficient number, since it is larger than the sum of its proper divisors (3036795372).

3991914988 is a wasteful number, since it uses less digits than its factorization.

3991914988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122736 (or 6122734 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 61.

The square root of 3991914988 is about 63181.6032401838. The cubic root of 3991914988 is about 1586.3308175263.

The spelling of 3991914988 in words is "three billion, nine hundred ninety-one million, nine hundred fourteen thousand, nine hundred eighty-eight".