3998249871 has 16 divisors (see below), whose sum is σ = 6646441728. Its totient is φ = 2077012800.

The previous prime is 3998249867. The next prime is 3998249917. The reversal of 3998249871 is 1789428993.

3998249871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3998249871 - 2² = 3998249867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998249851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8653990 + ... + 8654451.

It is an arithmetic number, because the mean of its divisors is an integer number (415402608).

Almost surely, 2^3998249871 is an apocalyptic number.

3998249871 is a deficient number, since it is larger than the sum of its proper divisors (2648191857).

3998249871 is a wasteful number, since it uses less digits than its factorization.

3998249871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17308462.

The product of its digits is 7838208, while the sum is 60.

The square root of 3998249871 is about 63231.7157050163. The cubic root of 3998249871 is about 1587.1695051439.

The spelling of 3998249871 in words is "three billion, nine hundred ninety-eight million, two hundred forty-nine thousand, eight hundred seventy-one".