9986638 has 8 divisors (see below), whose sum is σ = 15046632. Its totient is φ = 4971096.

The previous prime is 9986611. The next prime is 9986651. The reversal of 9986638 is 8366899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 9986591 and 9986600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10545 + ... + 11452.

It is an arithmetic number, because the mean of its divisors is an integer number (1880829).

Almost surely, 2^9986638 is an apocalyptic number.

9986638 is a deficient number, since it is larger than the sum of its proper divisors (5059994).

9986638 is a wasteful number, since it uses less digits than its factorization.

9986638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22226.

The product of its digits is 559872, while the sum is 49.

The square root of 9986638 is about 3160.1642362384. The cubic root of 9986638 is about 215.3474677104.

The spelling of 9986638 in words is "nine million, nine hundred eighty-six thousand, six hundred thirty-eight".