133328736 has 36 divisors (see below), whose sum is σ = 379154412. Its totient is φ = 44442816.

The previous prime is 133328717. The next prime is 133328743. The reversal of 133328736 is 637823331.

It is a happy number.

133328736 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 133328736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231186 + ... + 231761.

It is an arithmetic number, because the mean of its divisors is an integer number (10532067).

Almost surely, 2^133328736 is an apocalyptic number.

133328736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133328736 is an abundant number, since it is smaller than the sum of its proper divisors (245825676).

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

133328736 is a wasteful number, since it uses less digits than its factorization.

133328736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462963 (or 462952 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 133328736 is about 11546.8063117037. The cubic root of 133328736 is about 510.8670832284.

The spelling of 133328736 in words is "one hundred thirty-three million, three hundred twenty-eight thousand, seven hundred thirty-six".