8639408 has 20 divisors (see below), whose sum is σ = 16929720. Its totient is φ = 4270464.

The previous prime is 8639401. The next prime is 8639413. The reversal of 8639408 is 8049368.

8639408 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8639401) 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, 1610 + ... + 4457.

It is an arithmetic number, because the mean of its divisors is an integer number (846486).

Almost surely, 2^8639408 is an apocalyptic number.

It is an amenable number.

8639408 is a deficient number, since it is larger than the sum of its proper divisors (8290312).

8639408 is a wasteful number, since it uses less digits than its factorization.

8639408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164 (or 6158 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 8639408 is about 2939.2869883698. The cubic root of 8639408 is about 205.1924268934.

The spelling of 8639408 in words is "eight million, six hundred thirty-nine thousand, four hundred eight".