133444144 has 20 divisors (see below), whose sum is σ = 272156440. Its totient is φ = 63210240.

The previous prime is 133444141. The next prime is 133444159. The reversal of 133444144 is 441444331.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (133444141) by changing a digit.

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, 219177 + ... + 219784.

It is an arithmetic number, because the mean of its divisors is an integer number (13607822).

Almost surely, 2^133444144 is an apocalyptic number.

It is an amenable number.

133444144 is an abundant number, since it is smaller than the sum of its proper divisors (138712296).

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

133444144 is a wasteful number, since it uses less digits than its factorization.

133444144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438988 (or 438982 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 133444144 is about 11551.8026298929. The cubic root of 133444144 is about 511.0144411726.

Adding to 133444144 its reverse (441444331), we get a palindrome (574888475).

The spelling of 133444144 in words is "one hundred thirty-three million, four hundred forty-four thousand, one hundred forty-four".