9998208 has 128 divisors (see below), whose sum is σ = 32313600. Its totient is φ = 3018240.

The previous prime is 9998207. The next prime is 9998239. The reversal of 9998208 is 8028999.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×9998208² = 199928326422528, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37885 + ... + 38147.

It is an arithmetic number, because the mean of its divisors is an integer number (252450).

Almost surely, 2^9998208 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 9998208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16156800).

9998208 is an abundant number, since it is smaller than the sum of its proper divisors (22315392).

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

9998208 is a wasteful number, since it uses less digits than its factorization.

9998208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 9998208 is about 3161.9943073953. The cubic root of 9998208 is about 215.4305990778.

The spelling of 9998208 in words is "nine million, nine hundred ninety-eight thousand, two hundred eight".