133388268 has 48 divisors (see below), whose sum is σ = 339929856. Its totient is φ = 40461120.

The previous prime is 133388267. The next prime is 133388287. The reversal of 133388268 is 862883331.

It is not an unprimeable number, because it can be changed into a prime (133388267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5055 + ... + 17097.

It is an arithmetic number, because the mean of its divisors is an integer number (7081872).

Almost surely, 2^133388268 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 133388268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169964928).

133388268 is an abundant number, since it is smaller than the sum of its proper divisors (206541588).

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

133388268 is a wasteful number, since it uses less digits than its factorization.

133388268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12134 (or 12132 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 133388268 is about 11549.3838796708. The cubic root of 133388268 is about 510.9431068842.

The spelling of 133388268 in words is "one hundred thirty-three million, three hundred eighty-eight thousand, two hundred sixty-eight".