8638564 has 12 divisors (see below), whose sum is σ = 16491888. Its totient is φ = 3926600.

The previous prime is 8638543. The next prime is 8638583. The reversal of 8638564 is 4658368.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98122 + ... + 98209.

It is an arithmetic number, because the mean of its divisors is an integer number (1374324).

Almost surely, 2^8638564 is an apocalyptic number.

It is an amenable number.

8638564 is a deficient number, since it is larger than the sum of its proper divisors (7853324).

8638564 is a wasteful number, since it uses less digits than its factorization.

8638564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196346 (or 196344 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 8638564 is about 2939.1434126289. The cubic root of 8638564 is about 205.1857447979.

The spelling of 8638564 in words is "eight million, six hundred thirty-eight thousand, five hundred sixty-four".