8816021 has 8 divisors (see below), whose sum is σ = 8947224. Its totient is φ = 8686080.

The previous prime is 8815973. The next prime is 8816053. The reversal of 8816021 is 1206188.

It can be written as a sum of positive squares in 4 ways, for example, as 579121 + 8236900 = 761^2 + 2870^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8816021 - 2¹⁸ = 8553877 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 (8816221) 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, 36461 + ... + 36701.

It is an arithmetic number, because the mean of its divisors is an integer number (1118403).

Almost surely, 2^8816021 is an apocalyptic number.

It is an amenable number.

8816021 is a deficient number, since it is larger than the sum of its proper divisors (131203).

8816021 is a wasteful number, since it uses less digits than its factorization.

8816021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 8816021 is about 2969.1785059171. The cubic root of 8816021 is about 206.5812362245.

The spelling of 8816021 in words is "eight million, eight hundred sixteen thousand, twenty-one".