39998871 has 12 divisors (see below), whose sum is σ = 63028680. Its totient is φ = 24241680.

The previous prime is 39998851. The next prime is 39998891. The reversal of 39998871 is 17889993.

39998871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39998851) and next prime (39998891).

It is not a de Polignac number, because 39998871 - 2⁵ = 39998839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39998831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201916 + ... + 202113.

It is an arithmetic number, because the mean of its divisors is an integer number (5252390).

Almost surely, 2^39998871 is an apocalyptic number.

39998871 is a deficient number, since it is larger than the sum of its proper divisors (23029809).

39998871 is a wasteful number, since it uses less digits than its factorization.

39998871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404046 (or 404043 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 39998871 is about 6324.4660644200. The cubic root of 39998871 is about 341.9919717003.

The spelling of 39998871 in words is "thirty-nine million, nine hundred ninety-eight thousand, eight hundred seventy-one".