99998218 has 16 divisors (see below), whose sum is σ = 152087040. Its totient is φ = 49307616.

The previous prime is 99998207. The next prime is 99998231. The reversal of 99998218 is 81289999.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43543 + ... + 45781.

It is an arithmetic number, because the mean of its divisors is an integer number (9505440).

Almost surely, 2^99998218 is an apocalyptic number.

99998218 is a deficient number, since it is larger than the sum of its proper divisors (52088822).

99998218 is a wasteful number, since it uses less digits than its factorization.

99998218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541.

The product of its digits is 839808, while the sum is 55.

The square root of 99998218 is about 9999.9108996031. The cubic root of 99998218 is about 464.1561262411.

It can be divided in two parts, 999982 and 18, that added together give a 6-th power (1000000 = 10⁶).

The spelling of 99998218 in words is "ninety-nine million, nine hundred ninety-eight thousand, two hundred eighteen".