9721884 has 24 divisors (see below), whose sum is σ = 22740480. Its totient is φ = 3232624.

The previous prime is 9721883. The next prime is 9721891. The reversal of 9721884 is 4881279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6037 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (947520).

Almost surely, 2^9721884 is an apocalyptic number.

It is an amenable number.

9721884 is an abundant number, since it is smaller than the sum of its proper divisors (13018596).

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

9721884 is a wasteful number, since it uses less digits than its factorization.

9721884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009 (or 2007 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 9721884 is about 3117.9935856252. The cubic root of 9721884 is about 213.4273858292.

Subtracting from 9721884 its sum of digits (39), we obtain a triangular number (9721845 = T₄₄₀₉).

The spelling of 9721884 in words is "nine million, seven hundred twenty-one thousand, eight hundred eighty-four".