9972644 has 48 divisors (see below), whose sum is σ = 20428800. Its totient is φ = 4212000.

The previous prime is 9972631. The next prime is 9972649. The reversal of 9972644 is 4462799.

It is not an unprimeable number, because it can be changed into a prime (9972649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65969 + ... + 66119.

It is an arithmetic number, because the mean of its divisors is an integer number (425600).

Almost surely, 2^9972644 is an apocalyptic number.

It is an amenable number.

9972644 is an abundant number, since it is smaller than the sum of its proper divisors (10456156).

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

9972644 is a wasteful number, since it uses less digits than its factorization.

9972644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 262 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 9972644 is about 3157.9493346157. The cubic root of 9972644 is about 215.2468338711.

The spelling of 9972644 in words is "nine million, nine hundred seventy-two thousand, six hundred forty-four".