9888641 has 6 divisors (see below), whose sum is σ = 11503170. Its totient is φ = 8475936.

The previous prime is 9888631. The next prime is 9888661. The reversal of 9888641 is 1468889.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8439025 + 1449616 = 2905^2 + 1204^2 .

It is not a de Polignac number, because 9888641 - 2¹⁰ = 9887617 is a prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9888592 and 9888601.

It is not an unprimeable number, because it can be changed into a prime (9888631) 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 5 ways as a sum of consecutive naturals, for example, 100856 + ... + 100953.

It is an arithmetic number, because the mean of its divisors is an integer number (1917195).

Almost surely, 2^9888641 is an apocalyptic number.

It is an amenable number.

9888641 is a deficient number, since it is larger than the sum of its proper divisors (1614529).

9888641 is a wasteful number, since it uses less digits than its factorization.

9888641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201823 (or 201816 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 9888641 is about 3144.6209628507. The cubic root of 9888641 is about 214.6407629949.

The spelling of 9888641 in words is "nine million, eight hundred eighty-eight thousand, six hundred forty-one".