9999844 has 12 divisors (see below), whose sum is σ = 17535868.
Its totient is φ = 4989600.
The previous prime is 9999823. The next prime is 9999863. The reversal of 9999844 is 4489999.
It can be written as a sum of positive squares in 2 ways, for example, as 3849444 + 6150400 = 1962^2 + 2480^2
It is a nialpdrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 9999791 and 9999800.
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 3 ways as a sum of consecutive naturals, for example, 147 + ... + 4474.
Almost surely, 29999844 is an apocalyptic number.
It is an amenable number.
9999844 is a deficient number, since it is larger than the sum of its proper divisors (7536024).
9999844 is a wasteful number, since it uses less digits than its factorization.
9999844 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5166 (or 5164 counting only the distinct ones).
The product of its digits is 839808, while the sum is 52.
The square root of 9999844 is about 3162.2529943064.
The cubic root of 9999844 is about 215.4423486913.
The spelling of 9999844 in words is "nine million, nine hundred ninety-nine thousand, eight hundred forty-four".