3998872 has 32 divisors (see below), whose sum is σ = 7937280. Its totient is φ = 1884960.

The previous prime is 3998837. The next prime is 3998881. The reversal of 3998872 is 2788993.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18847 + ... + 19057.

It is an arithmetic number, because the mean of its divisors is an integer number (248040).

Almost surely, 2^3998872 is an apocalyptic number.

It is an amenable number.

3998872 is a deficient number, since it is larger than the sum of its proper divisors (3938408).

3998872 is a wasteful number, since it uses less digits than its factorization.

3998872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 339 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 3998872 is about 1999.7179801162. The cubic root of 3998872 is about 158.7251822241.

The spelling of 3998872 in words is "three million, nine hundred ninety-eight thousand, eight hundred seventy-two".