9645820 has 24 divisors (see below), whose sum is σ = 20487600. Its totient is φ = 3814272.

The previous prime is 9645791. The next prime is 9645827. The reversal of 9645820 is 285469.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9645827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930 + ... + 4489.

It is an arithmetic number, because the mean of its divisors is an integer number (853650).

Almost surely, 2^9645820 is an apocalyptic number.

It is an amenable number.

9645820 is an abundant number, since it is smaller than the sum of its proper divisors (10841780).

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

9645820 is a wasteful number, since it uses less digits than its factorization.

9645820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517 (or 5515 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 9645820 is about 3105.7720457239. The cubic root of 9645820 is about 212.8693093528.

The spelling of 9645820 in words is "nine million, six hundred forty-five thousand, eight hundred twenty".