4187998 has 8 divisors (see below), whose sum is σ = 6339960. Its totient is φ = 2074680.

The previous prime is 4187987. The next prime is 4188011. The reversal of 4187998 is 8997814.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9388 + ... + 9823.

It is an arithmetic number, because the mean of its divisors is an integer number (792495).

Almost surely, 2^4187998 is an apocalyptic number.

4187998 is a deficient number, since it is larger than the sum of its proper divisors (2151962).

4187998 is a wasteful number, since it uses less digits than its factorization.

4187998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19322.

The product of its digits is 145152, while the sum is 46.

The square root of 4187998 is about 2046.4598701172. The cubic root of 4187998 is about 161.1890324971.

The spelling of 4187998 in words is "four million, one hundred eighty-seven thousand, nine hundred ninety-eight".