133447168 has 40 divisors (see below), whose sum is σ = 269482752. Its totient is φ = 66011136.

The previous prime is 133447141. The next prime is 133447177. The reversal of 133447168 is 861744331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48321 + ... + 51007.

Almost surely, 2^133447168 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 133447168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134741376).

133447168 is an abundant number, since it is smaller than the sum of its proper divisors (136035584).

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

133447168 is an frugal number, since it uses more digits than its factorization.

133447168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802 (or 2786 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 133447168 is about 11551.9335178142. The cubic root of 133447168 is about 511.0183012046.

The spelling of 133447168 in words is "one hundred thirty-three million, four hundred forty-seven thousand, one hundred sixty-eight".