9720644 has 12 divisors (see below), whose sum is σ = 17180268. Its totient is φ = 4812000.

The previous prime is 9720631. The next prime is 9720653. The reversal of 9720644 is 4460279.

It can be written as a sum of positive squares in 2 ways, for example, as 9535744 + 184900 = 3088^2 + 430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9720644.

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, 11627 + ... + 12434.

It is an arithmetic number, because the mean of its divisors is an integer number (1431689).

Almost surely, 2^9720644 is an apocalyptic number.

It is an amenable number.

9720644 is a deficient number, since it is larger than the sum of its proper divisors (7459624).

9720644 is a wasteful number, since it uses less digits than its factorization.

9720644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24166 (or 24164 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 9720644 is about 3117.7947334615. The cubic root of 9720644 is about 213.4183114149.

The spelling of 9720644 in words is "nine million, seven hundred twenty thousand, six hundred forty-four".