8028821 has 4 divisors (see below), whose sum is σ = 8082144. Its totient is φ = 7975500.

The previous prime is 8028809. The next prime is 8028827. The reversal of 8028821 is 1288208.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8028821 - 2¹⁴ = 8012437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8028827) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 26435 + ... + 26736.

It is an arithmetic number, because the mean of its divisors is an integer number (2020536).

Almost surely, 2^8028821 is an apocalyptic number.

It is an amenable number.

8028821 is a deficient number, since it is larger than the sum of its proper divisors (53323).

8028821 is a wasteful number, since it uses less digits than its factorization.

8028821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53322.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 8028821 is about 2833.5174253920. The cubic root of 8028821 is about 200.2398871557.

The spelling of 8028821 in words is "eight million, twenty-eight thousand, eight hundred twenty-one".