8021864 has 32 divisors (see below), whose sum is σ = 15811200. Its totient is φ = 3810240.

The previous prime is 8021863. The next prime is 8021869. The reversal of 8021864 is 4681208.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (8021863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16229 + ... + 16715.

It is an arithmetic number, because the mean of its divisors is an integer number (494100).

Almost surely, 2^8021864 is an apocalyptic number.

It is an amenable number.

8021864 is a deficient number, since it is larger than the sum of its proper divisors (7789336).

8021864 is a wasteful number, since it uses less digits than its factorization.

8021864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 8021864 is about 2832.2895332222. The cubic root of 8021864 is about 200.1820342674.

The spelling of 8021864 in words is "eight million, twenty-one thousand, eight hundred sixty-four".