9938695788 has 240 divisors, whose sum is σ = 33097236480. Its totient is φ = 2531741184.

The previous prime is 9938695787. The next prime is 9938695799. The reversal of 9938695788 is 8875968399.

9938695788 is a `hidden beast` number, since 99 + 386 + 95 + 78 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (9938695787) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 725781 + ... + 739347.

It is an arithmetic number, because the mean of its divisors is an integer number (137905152).

Almost surely, 2^9938695788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9938695788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16548618240).

9938695788 is an abundant number, since it is smaller than the sum of its proper divisors (23158540692).

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

9938695788 is a wasteful number, since it uses less digits than its factorization.

9938695788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13626 (or 13615 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The square root of 9938695788 is about 99693.0077186961. The cubic root of 9938695788 is about 2150.0231321110.

The spelling of 9938695788 in words is "nine billion, nine hundred thirty-eight million, six hundred ninety-five thousand, seven hundred eighty-eight".