133806726 has 48 divisors (see below), whose sum is σ = 307402368. Its totient is φ = 41990400.

The previous prime is 133806679. The next prime is 133806727. The reversal of 133806726 is 627608331.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133806727) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 17406 + ... + 23886.

It is an arithmetic number, because the mean of its divisors is an integer number (6404216).

Almost surely, 2^133806726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133806726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153701184).

133806726 is an abundant number, since it is smaller than the sum of its proper divisors (173595642).

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

133806726 is a wasteful number, since it uses less digits than its factorization.

133806726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557 (or 6554 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 133806726 is about 11567.4857250830. The cubic root of 133806726 is about 511.4768495698.

The spelling of 133806726 in words is "one hundred thirty-three million, eight hundred six thousand, seven hundred twenty-six".