669288 has 32 divisors (see below), whose sum is σ = 1699200. Its totient is φ = 219648.

The previous prime is 669287. The next prime is 669289. The reversal of 669288 is 882966.

It is an interprime number because it is at equal distance from previous prime (669287) and next prime (669289).

It is not an unprimeable number, because it can be changed into a prime (669283) 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, 1720 + ... + 2072.

It is an arithmetic number, because the mean of its divisors is an integer number (53100).

2⁶⁶⁹²⁸⁸ is an apocalyptic number.

It is an amenable number.

669288 is an abundant number, since it is smaller than the sum of its proper divisors (1029912).

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

669288 is a wasteful number, since it uses less digits than its factorization.

669288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 437 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 669288 is about 818.1002383571. The cubic root of 669288 is about 87.4723940124.

The spelling of 669288 in words is "six hundred sixty-nine thousand, two hundred eighty-eight".