8821312 has 28 divisors (see below), whose sum is σ = 17599660. Its totient is φ = 4386816.

The previous prime is 8821303. The next prime is 8821313. The reversal of 8821312 is 2131288.

It can be written as a sum of positive squares in 2 ways, for example, as 5494336 + 3326976 = 2344^2 + 1824^2 .

It is not an unprimeable number, because it can be changed into a prime (8821313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21364 + ... + 21772.

Almost surely, 2^8821312 is an apocalyptic number.

It is an amenable number.

8821312 is a deficient number, since it is larger than the sum of its proper divisors (8778348).

8821312 is a wasteful number, since it uses less digits than its factorization.

8821312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 748 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 8821312 is about 2970.0693594595. The cubic root of 8821312 is about 206.6225550437.

The spelling of 8821312 in words is "eight million, eight hundred twenty-one thousand, three hundred twelve".