9973644 has 24 divisors (see below), whose sum is σ = 23419200. Its totient is φ = 3303504.

The previous prime is 9973631. The next prime is 9973669. The reversal of 9973644 is 4463799.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9973596 and 9973605.

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 7 ways as a sum of consecutive naturals, for example, 594 + ... + 4505.

It is an arithmetic number, because the mean of its divisors is an integer number (975800).

Almost surely, 2^9973644 is an apocalyptic number.

It is an amenable number.

9973644 is an abundant number, since it is smaller than the sum of its proper divisors (13445556).

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

9973644 is a wasteful number, since it uses less digits than its factorization.

9973644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269 (or 5267 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 9973644 is about 3158.1076612427. The cubic root of 9973644 is about 215.2540282066.

The spelling of 9973644 in words is "nine million, nine hundred seventy-three thousand, six hundred forty-four".