133433440 has 96 divisors (see below), whose sum is σ = 363908160. Its totient is φ = 45287424.

The previous prime is 133433411. The next prime is 133433453. The reversal of 133433440 is 44334331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121534 + ... + 122626.

It is an arithmetic number, because the mean of its divisors is an integer number (3790710).

Almost surely, 2^133433440 is an apocalyptic number.

133433440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133433440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181954080).

133433440 is an abundant number, since it is smaller than the sum of its proper divisors (230474720).

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

133433440 is a wasteful number, since it uses less digits than its factorization.

133433440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 133433440 is about 11551.3393162871. The cubic root of 133433440 is about 511.0007774162. Note that the first 3 decimals are identical.

Adding to 133433440 its reverse (44334331), we get a palindrome (177767771).

The spelling of 133433440 in words is "one hundred thirty-three million, four hundred thirty-three thousand, four hundred forty".