8905638 has 16 divisors (see below), whose sum is σ = 20355840. Its totient is φ = 2544456.

The previous prime is 8905619. The next prime is 8905657. The reversal of 8905638 is 8365098.

It is an interprime number because it is at equal distance from previous prime (8905619) and next prime (8905657).

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 = 8905596 and 8905605.

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 in 7 ways as a sum of consecutive naturals, for example, 105978 + ... + 106061.

It is an arithmetic number, because the mean of its divisors is an integer number (1272240).

Almost surely, 2^8905638 is an apocalyptic number.

8905638 is an abundant number, since it is smaller than the sum of its proper divisors (11450202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8905638 is a wasteful number, since it uses less digits than its factorization.

8905638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212051.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 8905638 is about 2984.2315593801. The cubic root of 8905638 is about 207.2788605519.

The spelling of 8905638 in words is "eight million, nine hundred five thousand, six hundred thirty-eight".