6649228 has 6 divisors (see below), whose sum is σ = 11636156. Its totient is φ = 3324612.

The previous prime is 6649199. The next prime is 6649229. The reversal of 6649228 is 8229466.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6649229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831150 + ... + 831157.

Almost surely, 2^6649228 is an apocalyptic number.

It is an amenable number.

6649228 is a deficient number, since it is larger than the sum of its proper divisors (4986928).

6649228 is a wasteful number, since it uses less digits than its factorization.

6649228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662311 (or 1662309 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 6649228 is about 2578.6097029213. The cubic root of 6649228 is about 188.0429583437.

It can be divided in two parts, 66 and 49228, that added together give a palindrome (49294).

The spelling of 6649228 in words is "six million, six hundred forty-nine thousand, two hundred twenty-eight".