9827985 has 16 divisors (see below), whose sum is σ = 15871680. Its totient is φ = 5192640.

The previous prime is 9827981. The next prime is 9827999. The reversal of 9827985 is 5897289.

It is a happy number.

It is not a de Polignac number, because 9827985 - 2² = 9827981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9827981) 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 15 ways as a sum of consecutive naturals, for example, 1371 + ... + 4640.

It is an arithmetic number, because the mean of its divisors is an integer number (991980).

Almost surely, 2^9827985 is an apocalyptic number.

It is an amenable number.

9827985 is a deficient number, since it is larger than the sum of its proper divisors (6043695).

9827985 is a wasteful number, since it uses less digits than its factorization.

9827985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6128.

The product of its digits is 362880, while the sum is 48.

The square root of 9827985 is about 3134.9617222544. The cubic root of 9827985 is about 214.2010004827.

The spelling of 9827985 in words is "nine million, eight hundred twenty-seven thousand, nine hundred eighty-five".