8220646 has 8 divisors (see below), whose sum is σ = 14092560. Its totient is φ = 3523128.

The previous prime is 8220631. The next prime is 8220649. The reversal of 8220646 is 6460228.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293581 + ... + 293608.

It is an arithmetic number, because the mean of its divisors is an integer number (1761570).

Almost surely, 2^8220646 is an apocalyptic number.

8220646 is a deficient number, since it is larger than the sum of its proper divisors (5871914).

8220646 is a wasteful number, since it uses less digits than its factorization.

8220646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587198.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 8220646 is about 2867.1668943401. The cubic root of 8220646 is about 201.8220666234.

The spelling of 8220646 in words is "eight million, two hundred twenty thousand, six hundred forty-six".