8216646 has 32 divisors (see below), whose sum is σ = 17031168. Its totient is φ = 2640960.

The previous prime is 8216641. The next prime is 8216647. The reversal of 8216646 is 6466128.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8216641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31111 + ... + 31373.

It is an arithmetic number, because the mean of its divisors is an integer number (532224).

Almost surely, 2^8216646 is an apocalyptic number.

8216646 is an abundant number, since it is smaller than the sum of its proper divisors (8814522).

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

8216646 is a wasteful number, since it uses less digits than its factorization.

8216646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 13824, while the sum is 33.

The square root of 8216646 is about 2866.4692567687. The cubic root of 8216646 is about 201.7893271347.

The spelling of 8216646 in words is "eight million, two hundred sixteen thousand, six hundred forty-six".