669228 has 48 divisors (see below), whose sum is σ = 1849344. Its totient is φ = 184320.

The previous prime is 669181. The next prime is 669241. The reversal of 669228 is 822966.

It is a super-2 number, since 2×669228² = 895732231968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2476 + ... + 2732.

It is an arithmetic number, because the mean of its divisors is an integer number (38528).

2⁶⁶⁹²²⁸ 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 669228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924672).

669228 is an abundant number, since it is smaller than the sum of its proper divisors (1180116).

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

669228 is a wasteful number, since it uses less digits than its factorization.

669228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 300 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 669228 is about 818.0635672122. The cubic root of 669228 is about 87.4697800403.

The spelling of 669228 in words is "six hundred sixty-nine thousand, two hundred twenty-eight".