9709640 has 32 divisors (see below), whose sum is σ = 22178880. Its totient is φ = 3824832.

The previous prime is 9709639. The next prime is 9709663. The reversal of 9709640 is 469079.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9709640.

It is an unprimeable number.

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, 869 + ... + 4491.

It is an arithmetic number, because the mean of its divisors is an integer number (693090).

Almost surely, 2^9709640 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 9709640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11089440).

9709640 is an abundant number, since it is smaller than the sum of its proper divisors (12469240).

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

9709640 is a wasteful number, since it uses less digits than its factorization.

9709640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 9709640 is about 3116.0295248922. The cubic root of 9709640 is about 213.3377494746.

The spelling of 9709640 in words is "nine million, seven hundred nine thousand, six hundred forty".