8985821 has 8 divisors (see below), whose sum is σ = 9700824. Its totient is φ = 8274240.

The previous prime is 8985817. The next prime is 8985833. The reversal of 8985821 is 1285898.

8985821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2805625 + 6180196 = 1675^2 + 2486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8985821 - 2² = 8985817 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 (8985811) 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, 8291 + ... + 9311.

It is an arithmetic number, because the mean of its divisors is an integer number (1212603).

Almost surely, 2^8985821 is an apocalyptic number.

It is an amenable number.

8985821 is a deficient number, since it is larger than the sum of its proper divisors (715003).

8985821 is a wasteful number, since it uses less digits than its factorization.

8985821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711.

The product of its digits is 46080, while the sum is 41.

The square root of 8985821 is about 2997.6359018400. The cubic root of 8985821 is about 207.8990896735.

The spelling of 8985821 in words is "eight million, nine hundred eighty-five thousand, eight hundred twenty-one".