9998388 has 72 divisors (see below), whose sum is σ = 26743080. Its totient is φ = 3144960.

The previous prime is 9998381. The next prime is 9998393. The reversal of 9998388 is 8838999.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 9998244 = 12^2 + 3162^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63606 + ... + 63762.

Almost surely, 2^9998388 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 9998388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13371540).

9998388 is an abundant number, since it is smaller than the sum of its proper divisors (16744692).

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

9998388 is a wasteful number, since it uses less digits than its factorization.

9998388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 252 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 9998388 is about 3162.0227703165. The cubic root of 9998388 is about 215.4318918854.

The spelling of 9998388 in words is "nine million, nine hundred ninety-eight thousand, three hundred eighty-eight".