9869786892 has 144 divisors (see below), whose sum is σ = 30086784000. Its totient is φ = 2664990720.

The previous prime is 9869786867. The next prime is 9869786897. The reversal of 9869786892 is 2986879689.

It is a self number, because there is not a number n which added to its sum of digits gives 9869786892.

It is not an unprimeable number, because it can be changed into a prime (9869786897) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2147517 + ... + 2152107.

It is an arithmetic number, because the mean of its divisors is an integer number (208936000).

Almost surely, 2^9869786892 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 9869786892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15043392000).

9869786892 is an abundant number, since it is smaller than the sum of its proper divisors (20216997108).

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

9869786892 is a wasteful number, since it uses less digits than its factorization.

9869786892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076 (or 5071 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 72.

The square root of 9869786892 is about 99346.8011160903. The cubic root of 9869786892 is about 2145.0426177002.

The spelling of 9869786892 in words is "nine billion, eight hundred sixty-nine million, seven hundred eighty-six thousand, eight hundred ninety-two".