6657228 has 48 divisors (see below), whose sum is σ = 17495520. Its totient is φ = 2216160.

The previous prime is 6657223. The next prime is 6657257. The reversal of 6657228 is 8227566.

6657228 is a `hidden beast` number, since 66 + 572 + 28 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6657192 and 6657201.

It is not an unprimeable number, because it can be changed into a prime (6657223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8368 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (364490).

Almost surely, 2^6657228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6657228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8747760).

6657228 is an abundant number, since it is smaller than the sum of its proper divisors (10838292).

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

6657228 is an equidigital number, since it uses as much as digits as its factorization.

6657228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 766 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 6657228 is about 2580.1604601265. The cubic root of 6657228 is about 188.1183425715.

The spelling of 6657228 in words is "six million, six hundred fifty-seven thousand, two hundred twenty-eight".