8661284 has 6 divisors (see below), whose sum is σ = 15157254. Its totient is φ = 4330640.

The previous prime is 8661281. The next prime is 8661311. The reversal of 8661284 is 4821668.

It can be written as a sum of positive squares in only one way, i.e., 4368100 + 4293184 = 2090^2 + 2072^2 .

It is not an unprimeable number, because it can be changed into a prime (8661281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082657 + ... + 1082664.

It is an arithmetic number, because the mean of its divisors is an integer number (2526209).

Almost surely, 2^8661284 is an apocalyptic number.

It is an amenable number.

8661284 is a deficient number, since it is larger than the sum of its proper divisors (6495970).

8661284 is a wasteful number, since it uses less digits than its factorization.

8661284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165325 (or 2165323 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 8661284 is about 2943.0059463073. The cubic root of 8661284 is about 205.3654713943.

Subtracting from 8661284 its sum of digits (35), we obtain a square (8661249 = 2943²).

The spelling of 8661284 in words is "eight million, six hundred sixty-one thousand, two hundred eighty-four".