9988216 has 16 divisors (see below), whose sum is σ = 21403440. Its totient is φ = 4280640.

The previous prime is 9988213. The next prime is 9988229. The reversal of 9988216 is 6128899.

It is a happy number.

It is a pancake number, because a pancake can be divided into 9988216 parts by 4469 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89125 + ... + 89236.

It is an arithmetic number, because the mean of its divisors is an integer number (1337715).

Almost surely, 2^9988216 is an apocalyptic number.

It is an amenable number.

9988216 is an abundant number, since it is smaller than the sum of its proper divisors (11415224).

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

9988216 is a wasteful number, since it uses less digits than its factorization.

9988216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178374 (or 178370 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 9988216 is about 3160.4138969445. The cubic root of 9988216 is about 215.3588095456.

The spelling of 9988216 in words is "nine million, nine hundred eighty-eight thousand, two hundred sixteen".