3998871 has 12 divisors (see below), whose sum is σ = 5911048. Its totient is φ = 2603664.

The previous prime is 3998837. The next prime is 3998881. The reversal of 3998871 is 1788993.

3998871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3998871 - 2²¹ = 1901719 is a prime.

It is a Duffinian number.

3998871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4780 + ... + 5553.

Almost surely, 2^3998871 is an apocalyptic number.

3998871 is a deficient number, since it is larger than the sum of its proper divisors (1912177).

3998871 is a wasteful number, since it uses less digits than its factorization.

3998871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10382 (or 10379 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3998871 is about 1999.7177300809. The cubic root of 3998871 is about 158.7251689933.

The spelling of 3998871 in words is "three million, nine hundred ninety-eight thousand, eight hundred seventy-one".