9657640 has 16 divisors (see below), whose sum is σ = 21729780. Its totient is φ = 3863040.

The previous prime is 9657619. The next prime is 9657653. The reversal of 9657640 is 467569.

It can be written as a sum of positive squares in 2 ways, for example, as 9647236 + 10404 = 3106^2 + 102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9657640.

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 3 ways as a sum of consecutive naturals, for example, 120681 + ... + 120760.

Almost surely, 2^9657640 is an apocalyptic number.

It is an amenable number.

9657640 is an abundant number, since it is smaller than the sum of its proper divisors (12072140).

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

9657640 is a wasteful number, since it uses less digits than its factorization.

9657640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241452 (or 241448 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 9657640 is about 3107.6743716162. The cubic root of 9657640 is about 212.9562239675.

The spelling of 9657640 in words is "nine million, six hundred fifty-seven thousand, six hundred forty".