9730640 has 20 divisors (see below), whose sum is σ = 22623924. Its totient is φ = 3892224.

The previous prime is 9730639. The next prime is 9730649. The reversal of 9730640 is 460379.

It can be written as a sum of positive squares in 2 ways, for example, as 7246864 + 2483776 = 2692^2 + 1576^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9730649) 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, 60737 + ... + 60896.

Almost surely, 2^9730640 is an apocalyptic number.

It is an amenable number.

9730640 is an abundant number, since it is smaller than the sum of its proper divisors (12893284).

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

9730640 is a wasteful number, since it uses less digits than its factorization.

9730640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121646 (or 121640 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 9730640 is about 3119.3973776997. The cubic root of 9730640 is about 213.4914409526.

The spelling of 9730640 in words is "nine million, seven hundred thirty thousand, six hundred forty".