9989438 has 16 divisors (see below), whose sum is σ = 15947280. Its totient is φ = 4676736.

The previous prime is 9989437. The next prime is 9989477. The reversal of 9989438 is 8349899.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989431) 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 7 ways as a sum of consecutive naturals, for example, 7145 + ... + 8427.

It is an arithmetic number, because the mean of its divisors is an integer number (996705).

Almost surely, 2^9989438 is an apocalyptic number.

9989438 is a deficient number, since it is larger than the sum of its proper divisors (5957842).

9989438 is a wasteful number, since it uses less digits than its factorization.

9989438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531.

The product of its digits is 559872, while the sum is 50.

The square root of 9989438 is about 3160.6072201398. The cubic root of 9989438 is about 215.3675918191.

The spelling of 9989438 in words is "nine million, nine hundred eighty-nine thousand, four hundred thirty-eight".