9988540 has 24 divisors (see below), whose sum is σ = 21132720. Its totient is φ = 3965568.

The previous prime is 9988519. The next prime is 9988553. The reversal of 9988540 is 458899.

It is a happy number.

9988540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984 + ... + 4576.

It is an arithmetic number, because the mean of its divisors is an integer number (880530).

Almost surely, 2^9988540 is an apocalyptic number.

It is an amenable number.

9988540 is an abundant number, since it is smaller than the sum of its proper divisors (11144180).

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

9988540 is a wasteful number, since it uses less digits than its factorization.

9988540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741 (or 3739 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 9988540 is about 3160.4651556377. The cubic root of 9988540 is about 215.3611381396.

The spelling of 9988540 in words is "nine million, nine hundred eighty-eight thousand, five hundred forty".