998798 has 8 divisors (see below), whose sum is σ = 1563408. Its totient is φ = 477664.

The previous prime is 998779. The next prime is 998813. The reversal of 998798 is 897899.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998798.

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, 10811 + ... + 10902.

It is an arithmetic number, because the mean of its divisors is an integer number (195426).

2⁹⁹⁸⁷⁹⁸ is an apocalyptic number.

998798 is a deficient number, since it is larger than the sum of its proper divisors (564610).

998798 is a wasteful number, since it uses less digits than its factorization.

998798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21738.

The product of its digits is 326592, while the sum is 50.

The square root of 998798 is about 999.3988192909. The cubic root of 998798 is about 99.9599172692.

The spelling of 998798 in words is "nine hundred ninety-eight thousand, seven hundred ninety-eight".