9839938236 has 72 divisors (see below), whose sum is σ = 23902980864. Its totient is φ = 3149115840.

The previous prime is 9839938193. The next prime is 9839938237. The reversal of 9839938236 is 6328399389.

It is a self number, because there is not a number n which added to its sum of digits gives 9839938236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9839938237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1581171 + ... + 1587381.

Almost surely, 2^9839938236 is an apocalyptic number.

It is an amenable number.

9839938236 is an abundant number, since it is smaller than the sum of its proper divisors (14063042628).

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

9839938236 is a wasteful number, since it uses less digits than its factorization.

9839938236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371 (or 6316 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 60.

The square root of 9839938236 is about 99196.4628200018. The cubic root of 9839938236 is about 2142.8780558696.

The spelling of 9839938236 in words is "nine billion, eight hundred thirty-nine million, nine hundred thirty-eight thousand, two hundred thirty-six".