8909638 has 4 divisors (see below), whose sum is σ = 13364460. Its totient is φ = 4454818.

The previous prime is 8909611. The next prime is 8909647. The reversal of 8909638 is 8369098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8369098 = 2 ⋅4184549.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 8909594 and 8909603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2227408 + ... + 2227411.

It is an arithmetic number, because the mean of its divisors is an integer number (3341115).

Almost surely, 2^8909638 is an apocalyptic number.

8909638 is a deficient number, since it is larger than the sum of its proper divisors (4454822).

8909638 is a wasteful number, since it uses less digits than its factorization.

8909638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454821.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 8909638 is about 2984.9016734224. The cubic root of 8909638 is about 207.3098892605.

The spelling of 8909638 in words is "eight million, nine hundred nine thousand, six hundred thirty-eight".