3187998 has 40 divisors (see below), whose sum is σ = 7797240. Its totient is φ = 965520.

The previous prime is 3187979. The next prime is 3188033. The reversal of 3187998 is 8997813.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 888 + ... + 2676.

It is an arithmetic number, because the mean of its divisors is an integer number (194931).

Almost surely, 2^3187998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3187998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3898620).

3187998 is an abundant number, since it is smaller than the sum of its proper divisors (4609242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3187998 is a wasteful number, since it uses less digits than its factorization.

3187998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 1805 counting only the distinct ones).

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

The square root of 3187998 is about 1785.4965695851. The cubic root of 3187998 is about 147.1767968606.

The spelling of 3187998 in words is "three million, one hundred eighty-seven thousand, nine hundred ninety-eight".