8122784 has 24 divisors (see below), whose sum is σ = 16545060. Its totient is φ = 3920896.

The previous prime is 8122781. The next prime is 8122799. The reversal of 8122784 is 4872218.

It can be written as a sum of positive squares in 2 ways, for example, as 7728400 + 394384 = 2780^2 + 628^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 8122784.

It is not an unprimeable number, because it can be changed into a prime (8122781) 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 3 ways as a sum of consecutive naturals, for example, 3449 + ... + 5304.

Almost surely, 2^8122784 is an apocalyptic number.

It is an amenable number.

8122784 is an abundant number, since it is smaller than the sum of its proper divisors (8422276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8122784 is a wasteful number, since it uses less digits than its factorization.

8122784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792 (or 8784 counting only the distinct ones).

The product of its digits is 7168, while the sum is 32.

The square root of 8122784 is about 2850.0498241259. The cubic root of 8122784 is about 201.0180094916.

The spelling of 8122784 in words is "eight million, one hundred twenty-two thousand, seven hundred eighty-four".