9938318208 has 128 divisors (see below), whose sum is σ = 32490769920. Its totient is φ = 2621085696.

The previous prime is 9938318207. The next prime is 9938318297. The reversal of 9938318208 is 8028138399.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9938318207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107260 + ... + 177147.

It is an arithmetic number, because the mean of its divisors is an integer number (253834140).

Almost surely, 2^9938318208 is an apocalyptic number.

It is an amenable number.

9938318208 is an abundant number, since it is smaller than the sum of its proper divisors (22552451712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9938318208 is a wasteful number, since it uses less digits than its factorization.

9938318208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284444 (or 284432 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 9938318208 is about 99691.1139871553. The cubic root of 9938318208 is about 2149.9959046614.

The spelling of 9938318208 in words is "nine billion, nine hundred thirty-eight million, three hundred eighteen thousand, two hundred eight".