9645640 has 16 divisors (see below), whose sum is σ = 21702780. Its totient is φ = 3858240.

The previous prime is 9645637. The next prime is 9645653. The reversal of 9645640 is 465469.

It can be written as a sum of positive squares in 2 ways, for example, as 9253764 + 391876 = 3042^2 + 626^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9645596 and 9645605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120531 + ... + 120610.

Almost surely, 2^9645640 is an apocalyptic number.

It is an amenable number.

9645640 is an abundant number, since it is smaller than the sum of its proper divisors (12057140).

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

9645640 is a wasteful number, since it uses less digits than its factorization.

9645640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241152 (or 241148 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 9645640 is about 3105.7430672868. The cubic root of 9645640 is about 212.8679852313.

The spelling of 9645640 in words is "nine million, six hundred forty-five thousand, six hundred forty".