2009998 has 8 divisors (see below), whose sum is σ = 3021192. Its totient is φ = 1002936.

The previous prime is 2009989. The next prime is 2009999. The reversal of 2009998 is 8999002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009999) 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 3 ways as a sum of consecutive naturals, for example, 936 + ... + 2212.

It is an arithmetic number, because the mean of its divisors is an integer number (377649).

2^2009998 is an apocalyptic number.

2009998 is a deficient number, since it is larger than the sum of its proper divisors (1011194).

2009998 is a wasteful number, since it uses less digits than its factorization.

2009998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 2009998 is about 1417.7439825300. The cubic root of 2009998 is about 126.2017009640.

The spelling of 2009998 in words is "two million, nine thousand, nine hundred ninety-eight".