9897850 has 12 divisors (see below), whose sum is σ = 18410094. Its totient is φ = 3959120.

The previous prime is 9897847. The next prime is 9897857. The reversal of 9897850 is 587989.

It can be written as a sum of positive squares in 3 ways, for example, as 5650129 + 4247721 = 2377^2 + 2061^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9897850.

It is not an unprimeable number, because it can be changed into a prime (9897857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98929 + ... + 99028.

Almost surely, 2^9897850 is an apocalyptic number.

9897850 is a deficient number, since it is larger than the sum of its proper divisors (8512244).

9897850 is a wasteful number, since it uses less digits than its factorization.

9897850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197969 (or 197964 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 9897850 is about 3146.0848685310. The cubic root of 9897850 is about 214.7073718617.

The spelling of 9897850 in words is "nine million, eight hundred ninety-seven thousand, eight hundred fifty".