9805500 has 72 divisors (see below), whose sum is σ = 30947280. Its totient is φ = 2613600.

The previous prime is 9805493. The next prime is 9805513. The reversal of 9805500 is 55089.

It is a super-2 number, since 2×9805500² = 192295660500000, which contains 22 as substring.

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3411 + ... + 5589.

Almost surely, 2^9805500 is an apocalyptic number.

9805500 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 9805500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15473640).

9805500 is an abundant number, since it is smaller than the sum of its proper divisors (21141780).

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

9805500 is a wasteful number, since it uses less digits than its factorization.

9805500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 9805500 is about 3131.3735005585. The cubic root of 9805500 is about 214.0375221713.

The spelling of 9805500 in words is "nine million, eight hundred five thousand, five hundred".