133488540 has 48 divisors (see below), whose sum is σ = 415299360. Its totient is φ = 35596800.

The previous prime is 133488533. The next prime is 133488541. The reversal of 133488540 is 45884331.

133488540 is a `hidden beast` number, since 1 + 3 + 34 + 88 + 540 = 666.

It is a super-2 number, since 2×133488540² = 35638380622663200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 133488495 and 133488504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133488541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123061 + ... + 124140.

It is an arithmetic number, because the mean of its divisors is an integer number (8652070).

Almost surely, 2^133488540 is an apocalyptic number.

133488540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133488540 is an abundant number, since it is smaller than the sum of its proper divisors (281810820).

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

133488540 is a wasteful number, since it uses less digits than its factorization.

133488540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247219 (or 247211 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 133488540 is about 11553.7240749466. The cubic root of 133488540 is about 511.0711052843.

The spelling of 133488540 in words is "one hundred thirty-three million, four hundred eighty-eight thousand, five hundred forty".