8217660 has 48 divisors (see below), whose sum is σ = 25103232. Its totient is φ = 1992000.

The previous prime is 8217653. The next prime is 8217661. The reversal of 8217660 is 667128.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8217661) 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 15 ways as a sum of consecutive naturals, for example, 5566 + ... + 6885.

It is an arithmetic number, because the mean of its divisors is an integer number (522984).

Almost surely, 2^8217660 is an apocalyptic number.

It is an amenable number.

8217660 is an abundant number, since it is smaller than the sum of its proper divisors (16885572).

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

8217660 is a wasteful number, since it uses less digits than its factorization.

8217660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12474 (or 12472 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 8217660 is about 2866.6461239574. The cubic root of 8217660 is about 201.7976276003.

The spelling of 8217660 in words is "eight million, two hundred seventeen thousand, six hundred sixty".