99998220 has 192 divisors, whose sum is σ = 337075200. Its totient is φ = 22127616.

The previous prime is 99998207. The next prime is 99998231. The reversal of 99998220 is 2289999.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99998220.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 884884 + ... + 884996.

It is an arithmetic number, because the mean of its divisors is an integer number (1755600).

Almost surely, 2^99998220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99998220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168537600).

99998220 is an abundant number, since it is smaller than the sum of its proper divisors (237076980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99998220 is a wasteful number, since it uses less digits than its factorization.

99998220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 99998220 is about 9999.9109996039. The cubic root of 99998220 is about 464.1561293356.

The spelling of 99998220 in words is "ninety-nine million, nine hundred ninety-eight thousand, two hundred twenty".