8220286 has 4 divisors (see below), whose sum is σ = 12330432. Its totient is φ = 4110142.

The previous prime is 8220283. The next prime is 8220287. The reversal of 8220286 is 6820228.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220281) 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 as a sum of consecutive naturals, namely, 2055070 + ... + 2055073.

It is an arithmetic number, because the mean of its divisors is an integer number (3082608).

Almost surely, 2^8220286 is an apocalyptic number.

8220286 is a deficient number, since it is larger than the sum of its proper divisors (4110146).

8220286 is a wasteful number, since it uses less digits than its factorization.

8220286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110145.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 8220286 is about 2867.1041139101. The cubic root of 8220286 is about 201.8191205043.

The spelling of 8220286 in words is "eight million, two hundred twenty thousand, two hundred eighty-six".