9981672 has 32 divisors (see below), whose sum is σ = 25488000. Its totient is φ = 3256064.

The previous prime is 9981661. The next prime is 9981689. The reversal of 9981672 is 2761899.

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, 3297 + ... + 5552.

It is an arithmetic number, because the mean of its divisors is an integer number (796500).

Almost surely, 2^9981672 is an apocalyptic number.

It is an amenable number.

9981672 is an abundant number, since it is smaller than the sum of its proper divisors (15506328).

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

9981672 is a wasteful number, since it uses less digits than its factorization.

9981672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8905 (or 8901 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 9981672 is about 3159.3784198795. The cubic root of 9981672 is about 215.3117669125.

The spelling of 9981672 in words is "nine million, nine hundred eighty-one thousand, six hundred seventy-two".