8638986 has 16 divisors (see below), whose sum is σ = 17306784. Its totient is φ = 2874864.

The previous prime is 8638967. The next prime is 8638991. The reversal of 8638986 is 6898368.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6516 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (1081674).

Almost surely, 2^8638986 is an apocalyptic number.

8638986 is an abundant number, since it is smaller than the sum of its proper divisors (8667798).

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

8638986 is a wasteful number, since it uses less digits than its factorization.

8638986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405.

The product of its digits is 497664, while the sum is 48.

The square root of 8638986 is about 2939.2152013760. The cubic root of 8638986 is about 205.1890859001.

The spelling of 8638986 in words is "eight million, six hundred thirty-eight thousand, nine hundred eighty-six".