8828821 has 4 divisors (see below), whose sum is σ = 8860972. Its totient is φ = 8796672.

The previous prime is 8828801. The next prime is 8828857. The reversal of 8828821 is 1288288.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1726596 + 7102225 = 1314^2 + 2665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8828821 is a prime.

It is a Duffinian number.

8828821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8828801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15660 + ... + 16213.

It is an arithmetic number, because the mean of its divisors is an integer number (2215243).

Almost surely, 2^8828821 is an apocalyptic number.

8828821 is the 1716-th hex number.

It is an amenable number.

8828821 is a deficient number, since it is larger than the sum of its proper divisors (32151).

8828821 is a wasteful number, since it uses less digits than its factorization.

8828821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32150.

The product of its digits is 16384, while the sum is 37.

The square root of 8828821 is about 2971.3332024531. Note that the first 3 decimals coincide. The cubic root of 8828821 is about 206.6811664587.

The spelling of 8828821 in words is "eight million, eight hundred twenty-eight thousand, eight hundred twenty-one".