8821384 has 48 divisors (see below), whose sum is σ = 19606860. Its totient is φ = 3696000.

The previous prime is 8821367. The next prime is 8821387. The reversal of 8821384 is 4831288.

It can be written as a sum of positive squares in 2 ways, for example, as 8820900 + 484 = 2970^2 + 22^2 .

It is not an unprimeable number, because it can be changed into a prime (8821387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12234 + ... + 12934.

Almost surely, 2^8821384 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 8821384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9803430).

8821384 is an abundant number, since it is smaller than the sum of its proper divisors (10785476).

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

8821384 is a wasteful number, since it uses less digits than its factorization.

8821384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 727 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 8821384 is about 2970.0814803638. The cubic root of 8821384 is about 206.6231171968.

The spelling of 8821384 in words is "eight million, eight hundred twenty-one thousand, three hundred eighty-four".