133040240 has 40 divisors (see below), whose sum is σ = 309810528. Its totient is φ = 53131520.

The previous prime is 133040227. The next prime is 133040279. The reversal of 133040240 is 42040331.

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

It is a congruent number.

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, 81674 + ... + 83286.

Almost surely, 2^133040240 is an apocalyptic number.

133040240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133040240 is an abundant number, since it is smaller than the sum of its proper divisors (176770288).

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

133040240 is a wasteful number, since it uses less digits than its factorization.

133040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 133040240 is about 11534.3070879876. The cubic root of 133040240 is about 510.4983466637.

Adding to 133040240 its reverse (42040331), we get a palindrome (175080571).

Subtracting from 133040240 its reverse (42040331), we obtain a palindrome (90999909).

The spelling of 133040240 in words is "one hundred thirty-three million, forty thousand, two hundred forty".