8638389 has 12 divisors (see below), whose sum is σ = 12503296. Its totient is φ = 5747112.

The previous prime is 8638381. The next prime is 8638403. The reversal of 8638389 is 9838368.

8638389 is a `hidden beast` number, since 8 + 638 + 3 + 8 + 9 = 666.

It is not a de Polignac number, because 8638389 - 2³ = 8638381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638381) 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, 7404 + ... + 8490.

Almost surely, 2^8638389 is an apocalyptic number.

It is an amenable number.

8638389 is a deficient number, since it is larger than the sum of its proper divisors (3864907).

8638389 is a wasteful number, since it uses less digits than its factorization.

8638389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976 (or 1973 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 8638389 is about 2939.1136418995. The cubic root of 8638389 is about 205.1843592378.

The spelling of 8638389 in words is "eight million, six hundred thirty-eight thousand, three hundred eighty-nine".