9840644 has 24 divisors (see below), whose sum is σ = 18933600. Its totient is φ = 4438080.

The previous prime is 9840643. The next prime is 9840647. The reversal of 9840644 is 4460489.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9840643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5312 + ... + 6920.

It is an arithmetic number, because the mean of its divisors is an integer number (788900).

Almost surely, 2^9840644 is an apocalyptic number.

It is an amenable number.

9840644 is a deficient number, since it is larger than the sum of its proper divisors (9092956).

9840644 is a wasteful number, since it uses less digits than its factorization.

9840644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 9840644 is about 3136.9800764429. The cubic root of 9840644 is about 214.2929286883.

It can be divided in two parts, 984064 and 4, that multiplied together give a square (3936256 = 1984²).

The spelling of 9840644 in words is "nine million, eight hundred forty thousand, six hundred forty-four".