9665140 has 36 divisors (see below), whose sum is σ = 20919276. Its totient is φ = 3750912.

The previous prime is 9665137. The next prime is 9665141. The reversal of 9665140 is 415669.

It can be written as a sum of positive squares in 6 ways, for example, as 1056784 + 8608356 = 1028^2 + 2934^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665141) 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 11 ways as a sum of consecutive naturals, for example, 27204 + ... + 27556.

It is an arithmetic number, because the mean of its divisors is an integer number (581091).

Almost surely, 2^9665140 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 9665140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10459638).

9665140 is an abundant number, since it is smaller than the sum of its proper divisors (11254136).

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

9665140 is a wasteful number, since it uses less digits than its factorization.

9665140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 9665140 is about 3108.8808275648. The cubic root of 9665140 is about 213.0113360656.

The spelling of 9665140 in words is "nine million, six hundred sixty-five thousand, one hundred forty".