9679640 has 32 divisors (see below), whose sum is σ = 22032000. Its totient is φ = 3826944.

The previous prime is 9679627. The next prime is 9679661. The reversal of 9679640 is 469769.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2201 + ... + 4919.

It is an arithmetic number, because the mean of its divisors is an integer number (688500).

Almost surely, 2^9679640 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 9679640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11016000).

9679640 is an abundant number, since it is smaller than the sum of its proper divisors (12352360).

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

9679640 is a wasteful number, since it uses less digits than its factorization.

9679640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819 (or 2815 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 9679640 is about 3111.2119824917. The cubic root of 9679640 is about 213.1178053316.

The spelling of 9679640 in words is "nine million, six hundred seventy-nine thousand, six hundred forty".