9644864 has 28 divisors (see below), whose sum is σ = 19661124. Its totient is φ = 4690944.

The previous prime is 9644861. The next prime is 9644867. The reversal of 9644864 is 4684469.

It is an interprime number because it is at equal distance from previous prime (9644861) and next prime (9644867).

It can be written as a sum of positive squares in 2 ways, for example, as 4840000 + 4804864 = 2200^2 + 2192^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9644861) 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, 332 + ... + 4404.

It is an arithmetic number, because the mean of its divisors is an integer number (702183).

Almost surely, 2^9644864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9644864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9830562).

9644864 is an abundant number, since it is smaller than the sum of its proper divisors (10016260).

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

9644864 is a wasteful number, since it uses less digits than its factorization.

9644864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122 (or 4112 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 9644864 is about 3105.6181349290. The cubic root of 9644864 is about 212.8622766076.

The spelling of 9644864 in words is "nine million, six hundred forty-four thousand, eight hundred sixty-four".