9644640 has 96 divisors (see below), whose sum is σ = 30917376. Its totient is φ = 2526720.

The previous prime is 9644633. The next prime is 9644641. The reversal of 9644640 is 464469.

9644640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9644641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33939 + ... + 34221.

It is an arithmetic number, because the mean of its divisors is an integer number (322056).

Almost surely, 2^9644640 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 9644640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15458688).

9644640 is an abundant number, since it is smaller than the sum of its proper divisors (21272736).

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

9644640 is a wasteful number, since it uses less digits than its factorization.

9644640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 9644640 is about 3105.5820710456. The cubic root of 9644640 is about 212.8606287005.

The spelling of 9644640 in words is "nine million, six hundred forty-four thousand, six hundred forty".