9861885 has 64 divisors (see below), whose sum is σ = 19872000. Its totient is φ = 4596480.

The previous prime is 9861883. The next prime is 9861913. The reversal of 9861885 is 5881689.

It is not a de Polignac number, because 9861885 - 2¹ = 9861883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 9861885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9861881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42951 + ... + 43179.

It is an arithmetic number, because the mean of its divisors is an integer number (310500).

Almost surely, 2^9861885 is an apocalyptic number.

It is an amenable number.

9861885 is an abundant number, since it is smaller than the sum of its proper divisors (10010115).

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

9861885 is a wasteful number, since it uses less digits than its factorization.

9861885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 277 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 9861885 is about 3140.3638324245. The cubic root of 9861885 is about 214.4470014302.

The spelling of 9861885 in words is "nine million, eight hundred sixty-one thousand, eight hundred eighty-five".