9888444 has 18 divisors (see below), whose sum is σ = 24995880. Its totient is φ = 3296136.

The previous prime is 9888443. The next prime is 9888451. The reversal of 9888444 is 4448889.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×9888444² = 195562649482272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9888444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137304 + ... + 137375.

It is an arithmetic number, because the mean of its divisors is an integer number (1388660).

Almost surely, 2^9888444 is an apocalyptic number.

It is an amenable number.

9888444 is an abundant number, since it is smaller than the sum of its proper divisors (15107436).

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

9888444 is a wasteful number, since it uses less digits than its factorization.

9888444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274689 (or 274684 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 9888444 is about 3144.5896393647. The cubic root of 9888444 is about 214.6393376386.

The spelling of 9888444 in words is "nine million, eight hundred eighty-eight thousand, four hundred forty-four".