133432240 has 40 divisors (see below), whose sum is σ = 310904208. Its totient is φ = 53256960.

The previous prime is 133432183. The next prime is 133432253. The reversal of 133432240 is 42234331.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41739 + ... + 44821.

Almost surely, 2^133432240 is an apocalyptic number.

133432240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133432240 is an abundant number, since it is smaller than the sum of its proper divisors (177471968).

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

133432240 is a wasteful number, since it uses less digits than its factorization.

133432240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3631 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 133432240 is about 11551.2873741415. The cubic root of 133432240 is about 510.9992455594. Note that the first 3 decimals are identical.

Adding to 133432240 its reverse (42234331), we get a palindrome (175666571).

The spelling of 133432240 in words is "one hundred thirty-three million, four hundred thirty-two thousand, two hundred forty".