2019998 has 8 divisors (see below), whose sum is σ = 3161808. Its totient is φ = 966064.

The previous prime is 2019977. The next prime is 2020001. The reversal of 2019998 is 8999102.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21911 + ... + 22002.

It is an arithmetic number, because the mean of its divisors is an integer number (395226).

2^2019998 is an apocalyptic number.

2019998 is a deficient number, since it is larger than the sum of its proper divisors (1141810).

2019998 is a wasteful number, since it uses less digits than its factorization.

2019998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43938.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 2019998 is about 1421.2663367575. The cubic root of 2019998 is about 126.4106447666.

The spelling of 2019998 in words is "two million, nineteen thousand, nine hundred ninety-eight".