8899821 has 48 divisors (see below), whose sum is σ = 15888000. Its totient is φ = 4921560.

The previous prime is 8899819. The next prime is 8899831. The reversal of 8899821 is 1289988.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 8899821 - 2¹ = 8899819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8899801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287076 + ... + 287106.

It is an arithmetic number, because the mean of its divisors is an integer number (331000).

Almost surely, 2^8899821 is an apocalyptic number.

It is an amenable number.

8899821 is a deficient number, since it is larger than the sum of its proper divisors (6988179).

8899821 is an equidigital number, since it uses as much as digits as its factorization.

8899821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 41 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 8899821 is about 2983.2567774163. The cubic root of 8899821 is about 207.2337204676.

The spelling of 8899821 in words is "eight million, eight hundred ninety-nine thousand, eight hundred twenty-one".