9998424 has 64 divisors (see below), whose sum is σ = 28476000. Its totient is φ = 3248640.

The previous prime is 9998423. The next prime is 9998441. The reversal of 9998424 is 4248999.

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

It is a self number, because there is not a number n which added to its sum of digits gives 9998424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998423) 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, 8292 + ... + 9420.

Almost surely, 2^9998424 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 9998424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14238000).

9998424 is an abundant number, since it is smaller than the sum of its proper divisors (18477576).

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

9998424 is a wasteful number, since it uses less digits than its factorization.

9998424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1175 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 9998424 is about 3162.0284628700. The cubic root of 9998424 is about 215.4321504450.

The spelling of 9998424 in words is "nine million, nine hundred ninety-eight thousand, four hundred twenty-four".