9999938 has 16 divisors (see below), whose sum is σ = 16275840.
Its totient is φ = 4580496.
The previous prime is 9999937. The next prime is 9999943. The reversal of 9999938 is 8399999.
It is a happy number.
It is not an unprimeable number, because it can be changed into a prime (9999931) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2231 + ... + 4997.
It is an arithmetic number, because the mean of its divisors is an integer number (1017240).
Almost surely, 29999938 is an apocalyptic number.
9999938 is a deficient number, since it is larger than the sum of its proper divisors (6275902).
9999938 is a wasteful number, since it uses less digits than its factorization.
9999938 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2921.
The product of its digits is 1417176, while the sum is 56.
The square root of 9999938 is about 3162.2678570924.
The cubic root of 9999938 is about 215.4430237524.
It can be divided in two parts, 999993 and 8, that added together give a palindrome (1000001).
The spelling of 9999938 in words is "nine million, nine hundred ninety-nine thousand, nine hundred thirty-eight".