3998187 has 16 divisors (see below), whose sum is σ = 5954080. Its totient is φ = 2651616.

The previous prime is 3998177. The next prime is 3998191. The reversal of 3998187 is 7818993.

It is not a de Polignac number, because 3998187 - 2⁴ = 3998171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998107) 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, 9873 + ... + 10269.

It is an arithmetic number, because the mean of its divisors is an integer number (372130).

Almost surely, 2^3998187 is an apocalyptic number.

3998187 is a deficient number, since it is larger than the sum of its proper divisors (1955893).

3998187 is a wasteful number, since it uses less digits than its factorization.

3998187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 773 counting only the distinct ones).

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

The square root of 3998187 is about 1999.5466986295. The cubic root of 3998187 is about 158.7161185883.

The spelling of 3998187 in words is "three million, nine hundred ninety-eight thousand, one hundred eighty-seven".