8638994 has 24 divisors (see below), whose sum is σ = 16236108. Its totient is φ = 3417120.

The previous prime is 8638991. The next prime is 8638997. The reversal of 8638994 is 4998368.

It is an interprime number because it is at equal distance from previous prime (8638991) and next prime (8638997).

It can be written as a sum of positive squares in 2 ways, for example, as 8196769 + 442225 = 2863^2 + 665^2 .

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8638991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2117 + ... + 4664.

Almost surely, 2^8638994 is an apocalyptic number.

8638994 is a deficient number, since it is larger than the sum of its proper divisors (7597114).

8638994 is a wasteful number, since it uses less digits than its factorization.

8638994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810 (or 6803 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 8638994 is about 2939.2165622832. The cubic root of 8638994 is about 205.1891492374.

The spelling of 8638994 in words is "eight million, six hundred thirty-eight thousand, nine hundred ninety-four".