8216638 has 8 divisors (see below), whose sum is σ = 12438360. Its totient is φ = 4070520.

The previous prime is 8216609. The next prime is 8216641. The reversal of 8216638 is 8366128.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18628 + ... + 19063.

It is an arithmetic number, because the mean of its divisors is an integer number (1554795).

Almost surely, 2^8216638 is an apocalyptic number.

8216638 is a deficient number, since it is larger than the sum of its proper divisors (4221722).

8216638 is a wasteful number, since it uses less digits than its factorization.

8216638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37802.

The product of its digits is 13824, while the sum is 34.

The square root of 8216638 is about 2866.4678613234. The cubic root of 8216638 is about 201.7892616451.

The spelling of 8216638 in words is "eight million, two hundred sixteen thousand, six hundred thirty-eight".