9806989500 has 864 divisors, whose sum is σ = 40601014272. Its totient is φ = 1948320000.

The previous prime is 9806989471. The next prime is 9806989541. The reversal of 9806989500 is 59896089.

It is a super-2 number, since 2×9806989500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 118156459 + ... + 118156541.

Almost surely, 2^9806989500 is an apocalyptic number.

9806989500 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9806989500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20300507136).

9806989500 is an abundant number, since it is smaller than the sum of its proper divisors (30794024772).

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

9806989500 is a wasteful number, since it uses less digits than its factorization.

9806989500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 9806989500 is about 99030.2453798838. The cubic root of 9806989500 is about 2140.4835937991.

The spelling of 9806989500 in words is "nine billion, eight hundred six million, nine hundred eighty-nine thousand, five hundred".