9998618 has 32 divisors (see below), whose sum is σ = 18589824. Its totient is φ = 3935232.

The previous prime is 9998603. The next prime is 9998623. The reversal of 9998618 is 8168999.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9746 + ... + 10722.

It is an arithmetic number, because the mean of its divisors is an integer number (580932).

Almost surely, 2^9998618 is an apocalyptic number.

9998618 is a deficient number, since it is larger than the sum of its proper divisors (8591206).

9998618 is a wasteful number, since it uses less digits than its factorization.

9998618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046.

The product of its digits is 279936, while the sum is 50.

The square root of 9998618 is about 3162.0591392319. The cubic root of 9998618 is about 215.4335437835.

The spelling of 9998618 in words is "nine million, nine hundred ninety-eight thousand, six hundred eighteen".