8668215 has 40 divisors (see below), whose sum is σ = 16465680. Its totient is φ = 4347648.

The previous prime is 8668207. The next prime is 8668267. The reversal of 8668215 is 5128668.

It is a happy number.

It is not a de Polignac number, because 8668215 - 2³ = 8668207 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8668215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6256 + ... + 7514.

It is an arithmetic number, because the mean of its divisors is an integer number (411642).

Almost surely, 2^8668215 is an apocalyptic number.

8668215 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

8668215 is a deficient number, since it is larger than the sum of its proper divisors (7797465).

8668215 is a wasteful number, since it uses less digits than its factorization.

8668215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1284 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 8668215 is about 2944.1832483730. The cubic root of 8668215 is about 205.4202365066.

The spelling of 8668215 in words is "eight million, six hundred sixty-eight thousand, two hundred fifteen".