8640164 has 12 divisors (see below), whose sum is σ = 16283484. Its totient is φ = 3987744.

The previous prime is 8640161. The next prime is 8640169. The reversal of 8640164 is 4610468.

It can be written as a sum of positive squares in 2 ways, for example, as 3211264 + 5428900 = 1792^2 + 2330^2 .

It is not an unprimeable number, because it can be changed into a prime (8640161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83027 + ... + 83130.

It is an arithmetic number, because the mean of its divisors is an integer number (1356957).

Almost surely, 2^8640164 is an apocalyptic number.

It is an amenable number.

8640164 is a deficient number, since it is larger than the sum of its proper divisors (7643320).

8640164 is a wasteful number, since it uses less digits than its factorization.

8640164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166174 (or 166172 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8640164 is about 2939.4155881739. The cubic root of 8640164 is about 205.1984119081.

The spelling of 8640164 in words is "eight million, six hundred forty thousand, one hundred sixty-four".