9998558 has 8 divisors (see below), whose sum is σ = 15076128. Its totient is φ = 4973184.

The previous prime is 9998557. The next prime is 9998561. The reversal of 9998558 is 8558999.

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 (9998557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12566 + ... + 13337.

It is an arithmetic number, because the mean of its divisors is an integer number (1884516).

Almost surely, 2^9998558 is an apocalyptic number.

9998558 is a deficient number, since it is larger than the sum of its proper divisors (5077570).

9998558 is a wasteful number, since it uses less digits than its factorization.

9998558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26098.

The product of its digits is 1166400, while the sum is 53.

The square root of 9998558 is about 3162.0496517291. The cubic root of 9998558 is about 215.4331128560.

The spelling of 9998558 in words is "nine million, nine hundred ninety-eight thousand, five hundred fifty-eight".