133940064 has 24 divisors (see below), whose sum is σ = 351592920. Its totient is φ = 44646656.

The previous prime is 133940047. The next prime is 133940069. The reversal of 133940064 is 460049331.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133940069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697509 + ... + 697700.

It is an arithmetic number, because the mean of its divisors is an integer number (14649705).

Almost surely, 2^133940064 is an apocalyptic number.

It is an amenable number.

133940064 is an abundant number, since it is smaller than the sum of its proper divisors (217652856).

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

133940064 is a wasteful number, since it uses less digits than its factorization.

133940064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395222 (or 1395214 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 133940064 is about 11573.2477723412. The cubic root of 133940064 is about 511.6466882152.

Adding to 133940064 its reverse (460049331), we get a palindrome (593989395).

The spelling of 133940064 in words is "one hundred thirty-three million, nine hundred forty thousand, sixty-four".