9998240 has 96 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 3354624.

The previous prime is 9998239. The next prime is 9998249. The reversal of 9998240 is 428999.

It is not an unprimeable number, because it can be changed into a prime (9998249) 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, 88424 + ... + 88536.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

Almost surely, 2^9998240 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 9998240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13789440).

9998240 is an abundant number, since it is smaller than the sum of its proper divisors (17580640).

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

9998240 is a wasteful number, since it uses less digits than its factorization.

9998240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 9998240 is about 3161.9993674889. Note that the first 3 decimals coincide. The cubic root of 9998240 is about 215.4308289114.

The spelling of 9998240 in words is "nine million, nine hundred ninety-eight thousand, two hundred forty".