9869889012 has 12 divisors (see below), whose sum is σ = 23029741056. Its totient is φ = 3289963000.

The previous prime is 9869889011. The next prime is 9869889047. The reversal of 9869889012 is 2109889689.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×9869889012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9869889011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411245364 + ... + 411245387.

It is an arithmetic number, because the mean of its divisors is an integer number (1919145088).

Almost surely, 2^9869889012 is an apocalyptic number.

It is an amenable number.

9869889012 is an abundant number, since it is smaller than the sum of its proper divisors (13159852044).

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

9869889012 is a wasteful number, since it uses less digits than its factorization.

9869889012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822490758 (or 822490756 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 60.

The square root of 9869889012 is about 99347.3150719233. The cubic root of 9869889012 is about 2145.0500157322.

The spelling of 9869889012 in words is "nine billion, eight hundred sixty-nine million, eight hundred eighty-nine thousand, twelve".