9899938 has 8 divisors (see below), whose sum is σ = 14868432. Its totient is φ = 4943796.

The previous prime is 9899921. The next prime is 9899947. The reversal of 9899938 is 8399989.

9899938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 720 + ... + 4507.

It is an arithmetic number, because the mean of its divisors is an integer number (1858554).

Almost surely, 2^9899938 is an apocalyptic number.

9899938 is a deficient number, since it is larger than the sum of its proper divisors (4968494).

9899938 is a wasteful number, since it uses less digits than its factorization.

9899938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6176.

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

The square root of 9899938 is about 3146.4166920483. The cubic root of 9899938 is about 214.7224686578.

The spelling of 9899938 in words is "nine million, eight hundred ninety-nine thousand, nine hundred thirty-eight".