9865540 has 12 divisors (see below), whose sum is σ = 20717676. Its totient is φ = 3946208.

The previous prime is 9865529. The next prime is 9865547. The reversal of 9865540 is 455689.

It can be written as a sum of positive squares in 2 ways, for example, as 3147076 + 6718464 = 1774^2 + 2592^2 .

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 9865540.

It is not an unprimeable number, because it can be changed into a prime (9865547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246619 + ... + 246658.

It is an arithmetic number, because the mean of its divisors is an integer number (1726473).

Almost surely, 2^9865540 is an apocalyptic number.

It is an amenable number.

9865540 is an abundant number, since it is smaller than the sum of its proper divisors (10852136).

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

9865540 is a wasteful number, since it uses less digits than its factorization.

9865540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493286 (or 493284 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 9865540 is about 3140.9457174552. The cubic root of 9865540 is about 214.4734908548.

The spelling of 9865540 in words is "nine million, eight hundred sixty-five thousand, five hundred forty".