9973656 has 144 divisors (see below), whose sum is σ = 34412040. Its totient is φ = 2580480.

The previous prime is 9973631. The next prime is 9973669. The reversal of 9973656 is 6563799.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 38680 + ... + 38936.

Almost surely, 2^9973656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9973656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17206020).

9973656 is an abundant number, since it is smaller than the sum of its proper divisors (24438384).

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

9973656 is a wasteful number, since it uses less digits than its factorization.

9973656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 280 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 9973656 is about 3158.1095611141. The cubic root of 9973656 is about 215.2541145357.

The spelling of 9973656 in words is "nine million, nine hundred seventy-three thousand, six hundred fifty-six".