8638667 has 8 divisors (see below), whose sum is σ = 8773632. Its totient is φ = 8505000.

The previous prime is 8638661. The next prime is 8638687. The reversal of 8638667 is 7668368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8638667 - 2⁸ = 8638411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8638661) 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 7 ways as a sum of consecutive naturals, for example, 31742 + ... + 32012.

It is an arithmetic number, because the mean of its divisors is an integer number (1096704).

Almost surely, 2^8638667 is an apocalyptic number.

8638667 is a deficient number, since it is larger than the sum of its proper divisors (134965).

8638667 is a wasteful number, since it uses less digits than its factorization.

8638667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its digits is 290304, while the sum is 44.

The square root of 8638667 is about 2939.1609346887. The cubic root of 8638667 is about 205.1865602902.

Subtracting from 8638667 its reverse (7668368), we obtain a cube (970299 = 99³).

The spelling of 8638667 in words is "eight million, six hundred thirty-eight thousand, six hundred sixty-seven".