9998928 has 60 divisors (see below), whose sum is σ = 29209440. Its totient is φ = 3187008.

The previous prime is 9998903. The next prime is 9998929. The reversal of 9998928 is 8298999.

It is a super-2 number, since 2×9998928² = 199957122298368, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1803 + ... + 4821.

It is an arithmetic number, because the mean of its divisors is an integer number (486824).

Almost surely, 2^9998928 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 9998928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14604720).

9998928 is an abundant number, since it is smaller than the sum of its proper divisors (19210512).

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

9998928 is a wasteful number, since it uses less digits than its factorization.

9998928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3047 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 9998928 is about 3162.1081575430. The cubic root of 9998928 is about 215.4357702148.

The spelling of 9998928 in words is "nine million, nine hundred ninety-eight thousand, nine hundred twenty-eight".