9986500 has 24 divisors (see below), whose sum is σ = 21811608. Its totient is φ = 3994400.

The previous prime is 9986489. The next prime is 9986503. The reversal of 9986500 is 56899.

It can be written as a sum of positive squares in 4 ways, for example, as 732736 + 9253764 = 856^2 + 3042^2 .

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9986500.

It is not an unprimeable number, because it can be changed into a prime (9986503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9487 + ... + 10486.

It is an arithmetic number, because the mean of its divisors is an integer number (908817).

Almost surely, 2^9986500 is an apocalyptic number.

It is an amenable number.

9986500 is an abundant number, since it is smaller than the sum of its proper divisors (11825108).

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

9986500 is a wasteful number, since it uses less digits than its factorization.

9986500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19992 (or 19980 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 9986500 is about 3160.1424018547. The cubic root of 9986500 is about 215.3464757821.

The spelling of 9986500 in words is "nine million, nine hundred eighty-six thousand, five hundred".