2017998 has 12 divisors (see below), whose sum is σ = 4372368. Its totient is φ = 672660.

The previous prime is 2017991. The next prime is 2018021. The reversal of 2017998 is 8997102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2017991) 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 5 ways as a sum of consecutive naturals, for example, 56038 + ... + 56073.

It is an arithmetic number, because the mean of its divisors is an integer number (364364).

2^2017998 is an apocalyptic number.

2017998 is an abundant number, since it is smaller than the sum of its proper divisors (2354370).

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

2017998 is a wasteful number, since it uses less digits than its factorization.

2017998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112119 (or 112116 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2017998 is about 1420.5625646201. The cubic root of 2017998 is about 126.3689112641.

The spelling of 2017998 in words is "two million, seventeen thousand, nine hundred ninety-eight".