9861040 has 40 divisors (see below), whose sum is σ = 26203680. Its totient is φ = 3380736.

The previous prime is 9861029. The next prime is 9861041. The reversal of 9861040 is 401689.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9861041) 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 7 ways as a sum of consecutive naturals, for example, 8245 + ... + 9364.

It is an arithmetic number, because the mean of its divisors is an integer number (655092).

Almost surely, 2^9861040 is an apocalyptic number.

It is an amenable number.

9861040 is an abundant number, since it is smaller than the sum of its proper divisors (16342640).

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

9861040 is a wasteful number, since it uses less digits than its factorization.

9861040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17629 (or 17623 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 9861040 is about 3140.2292909913. The cubic root of 9861040 is about 214.4408764046.

The spelling of 9861040 in words is "nine million, eight hundred sixty-one thousand, forty".