8666628 has 24 divisors (see below), whose sum is σ = 20566560. Its totient is φ = 2839680.

The previous prime is 8666627. The next prime is 8666681. The reversal of 8666628 is 8266668.

It is a super-2 number, since 2×8666628² = 150220881780768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8666628.

It is not an unprimeable number, because it can be changed into a prime (8666627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5413 + ... + 6828.

It is an arithmetic number, because the mean of its divisors is an integer number (856940).

Almost surely, 2^8666628 is an apocalyptic number.

It is an amenable number.

8666628 is an abundant number, since it is smaller than the sum of its proper divisors (11899932).

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

8666628 is a wasteful number, since it uses less digits than its factorization.

8666628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12307 (or 12305 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 8666628 is about 2943.9137215618. The cubic root of 8666628 is about 205.4076994459.

The spelling of 8666628 in words is "eight million, six hundred sixty-six thousand, six hundred twenty-eight".