8218656 has 36 divisors (see below), whose sum is σ = 23372622. Its totient is φ = 2739456.

The previous prime is 8218619. The next prime is 8218663. The reversal of 8218656 is 6568128.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7952400 + 266256 = 2820^2 + 516^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8218656.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13981 + ... + 14556.

Almost surely, 2^8218656 is an apocalyptic number.

It is an amenable number.

8218656 is an abundant number, since it is smaller than the sum of its proper divisors (15153966).

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

8218656 is a wasteful number, since it uses less digits than its factorization.

8218656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28553 (or 28542 counting only the distinct ones).

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

The square root of 8218656 is about 2866.8198408690. The cubic root of 8218656 is about 201.8057800556.

The spelling of 8218656 in words is "eight million, two hundred eighteen thousand, six hundred fifty-six".