133880064 has 72 divisors (see below), whose sum is σ = 363995520. Its totient is φ = 43665408.

The previous prime is 133880053. The next prime is 133880077. The reversal of 133880064 is 460088331.

It is a nialpdrome in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34242 + ... + 37950.

Almost surely, 2^133880064 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 133880064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181997760).

133880064 is an abundant number, since it is smaller than the sum of its proper divisors (230115456).

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

133880064 is an equidigital number, since it uses as much as digits as its factorization.

133880064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775 (or 3761 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 133880064 is about 11570.6552969138. The cubic root of 133880064 is about 511.5702774548.

The spelling of 133880064 in words is "one hundred thirty-three million, eight hundred eighty thousand, sixty-four".