9986438 has 32 divisors (see below), whose sum is σ = 19664640. Its totient is φ = 3684960.

The previous prime is 9986413. The next prime is 9986443. The reversal of 9986438 is 8346899.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9986392 and 9986401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1220 + ... + 4632.

It is an arithmetic number, because the mean of its divisors is an integer number (614520).

Almost surely, 2^9986438 is an apocalyptic number.

9986438 is a deficient number, since it is larger than the sum of its proper divisors (9678202).

9986438 is a wasteful number, since it uses less digits than its factorization.

9986438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452.

The product of its digits is 373248, while the sum is 47.

The square root of 9986438 is about 3160.1325921550. The cubic root of 9986438 is about 215.3460301302.

The spelling of 9986438 in words is "nine million, nine hundred eighty-six thousand, four hundred thirty-eight".