9988641 has 24 divisors (see below), whose sum is σ = 15812160. Its totient is φ = 6038496.

The previous prime is 9988633. The next prime is 9988687. The reversal of 9988641 is 1468899.

It is not a de Polignac number, because 9988641 - 2³ = 9988633 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9988691) 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, 6180 + ... + 7626.

It is an arithmetic number, because the mean of its divisors is an integer number (658840).

Almost surely, 2^9988641 is an apocalyptic number.

It is an amenable number.

9988641 is a deficient number, since it is larger than the sum of its proper divisors (5823519).

9988641 is a wasteful number, since it uses less digits than its factorization.

9988641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525 (or 1522 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 9988641 is about 3160.4811342579. The cubic root of 9988641 is about 215.3618640182.

The spelling of 9988641 in words is "nine million, nine hundred eighty-eight thousand, six hundred forty-one".