133385844 has 12 divisors (see below), whose sum is σ = 311233664. Its totient is φ = 44461944.

The previous prime is 133385831. The next prime is 133385911. The reversal of 133385844 is 448583331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5557732 + ... + 5557755.

Almost surely, 2^133385844 is an apocalyptic number.

It is an amenable number.

133385844 is an abundant number, since it is smaller than the sum of its proper divisors (177847820).

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

133385844 is a wasteful number, since it uses less digits than its factorization.

133385844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11115494 (or 11115492 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 133385844 is about 11549.2789385312. The cubic root of 133385844 is about 510.9400118254.

The spelling of 133385844 in words is "one hundred thirty-three million, three hundred eighty-five thousand, eight hundred forty-four".