9999998208 has 108 divisors (see below), whose sum is σ = 29900515008. Its totient is φ = 3333312000.

The previous prime is 9999998191. The next prime is 9999998231. The reversal of 9999998208 is 8028999999.

It is a tau number, because it is divible by the number of its divisors (108).

It is a super-2 number, since 2×9999998208² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 18168 + ... + 142583.

Almost surely, 2^9999998208 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 9999998208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14950257504).

9999998208 is an abundant number, since it is smaller than the sum of its proper divisors (19900516800).

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

9999998208 is an equidigital number, since it uses as much as digits as its factorization.

9999998208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160782 (or 160756 counting only the distinct ones).

The product of its (nonzero) digits is 68024448, while the sum is 72.

The square root of 9999998208 is about 99999.9910399996. The cubic root of 9999998208 is about 2154.4345613403.

The spelling of 9999998208 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, two hundred eight".