8220687 has 8 divisors (see below), whose sum is σ = 10982400. Its totient is φ = 5469720.

The previous prime is 8220649. The next prime is 8220689. The reversal of 8220687 is 7860228.

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

It is not a de Polignac number, because 8220687 - 2¹⁵ = 8187919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220689) by changing a digit.

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, 687 + ... + 4112.

It is an arithmetic number, because the mean of its divisors is an integer number (1372800).

Almost surely, 2^8220687 is an apocalyptic number.

8220687 is a deficient number, since it is larger than the sum of its proper divisors (2761713).

8220687 is a wasteful number, since it uses less digits than its factorization.

8220687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 8220687 is about 2867.1740442464. The cubic root of 8220687 is about 201.8224021481.

The spelling of 8220687 in words is "eight million, two hundred twenty thousand, six hundred eighty-seven".