6445228 has 6 divisors (see below), whose sum is σ = 11279156. Its totient is φ = 3222612.

The previous prime is 6445223. The next prime is 6445247. The reversal of 6445228 is 8225446.

It is a self number, because there is not a number n which added to its sum of digits gives 6445228.

It is not an unprimeable number, because it can be changed into a prime (6445223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805650 + ... + 805657.

Almost surely, 2^6445228 is an apocalyptic number.

It is an amenable number.

6445228 is a deficient number, since it is larger than the sum of its proper divisors (4833928).

6445228 is a wasteful number, since it uses less digits than its factorization.

6445228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611311 (or 1611309 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 6445228 is about 2538.7453594246. The cubic root of 6445228 is about 186.0998808368.

The spelling of 6445228 in words is "six million, four hundred forty-five thousand, two hundred twenty-eight".