9988518 has 16 divisors (see below), whose sum is σ = 20054016. Its totient is φ = 3316680.

The previous prime is 9988481. The next prime is 9988519. The reversal of 9988518 is 8158899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1446 + ... + 4697.

It is an arithmetic number, because the mean of its divisors is an integer number (1253376).

Almost surely, 2^9988518 is an apocalyptic number.

9988518 is an abundant number, since it is smaller than the sum of its proper divisors (10065498).

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

9988518 is a wasteful number, since it uses less digits than its factorization.

9988518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6419.

The product of its digits is 207360, while the sum is 48.

The square root of 9988518 is about 3160.4616751355. The cubic root of 9988518 is about 215.3609800268.

The spelling of 9988518 in words is "nine million, nine hundred eighty-eight thousand, five hundred eighteen".