9988444 has 24 divisors (see below), whose sum is σ = 17984960. Its totient is φ = 4852224.

The previous prime is 9988411. The next prime is 9988453. The reversal of 9988444 is 4448899.

It is a happy number.

It is a super-2 number, since 2×9988444² = 199538027082272, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9988394 and 9988403.

It is a congruent number.

It is an unprimeable number.

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, 22852 + ... + 23284.

Almost surely, 2^9988444 is an apocalyptic number.

It is an amenable number.

9988444 is a deficient number, since it is larger than the sum of its proper divisors (7996516).

9988444 is a wasteful number, since it uses less digits than its factorization.

9988444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 587 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 9988444 is about 3160.4499679634. The cubic root of 9988444 is about 215.3604481911.

The spelling of 9988444 in words is "nine million, nine hundred eighty-eight thousand, four hundred forty-four".