8639998 has 8 divisors (see below), whose sum is σ = 12984192. Its totient is φ = 4311936.

The previous prime is 8639987. The next prime is 8640001. The reversal of 8639998 is 8999368.

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

It is a congruent number.

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, 2590 + ... + 4897.

It is an arithmetic number, because the mean of its divisors is an integer number (1623024).

Almost surely, 2^8639998 is an apocalyptic number.

8639998 is a deficient number, since it is larger than the sum of its proper divisors (4344194).

8639998 is a wasteful number, since it uses less digits than its factorization.

8639998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8066.

The product of its digits is 839808, while the sum is 52.

The square root of 8639998 is about 2939.3873511329. The cubic root of 8639998 is about 205.1970977681.

The spelling of 8639998 in words is "eight million, six hundred thirty-nine thousand, nine hundred ninety-eight".