9999838 has 8 divisors (see below), whose sum is σ = 15517080. Its totient is φ = 4827480.

The previous prime is 9999823. The next prime is 9999863. The reversal of 9999838 is 8389999.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 86148 + ... + 86263.

It is an arithmetic number, because the mean of its divisors is an integer number (1939635).

Almost surely, 2^9999838 is an apocalyptic number.

9999838 is a deficient number, since it is larger than the sum of its proper divisors (5517242).

9999838 is a wasteful number, since it uses less digits than its factorization.

9999838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172442.

The product of its digits is 1259712, while the sum is 55.

The square root of 9999838 is about 3162.2520456156. The cubic root of 9999838 is about 215.4423056022.

The spelling of 9999838 in words is "nine million, nine hundred ninety-nine thousand, eight hundred thirty-eight".