133406540 has 12 divisors (see below), whose sum is σ = 280153776. Its totient is φ = 53362608.

The previous prime is 133406519. The next prime is 133406549. The reversal of 133406540 is 45604331.

It is not an unprimeable number, because it can be changed into a prime (133406549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335144 + ... + 3335183.

It is an arithmetic number, because the mean of its divisors is an integer number (23346148).

Almost surely, 2^133406540 is an apocalyptic number.

133406540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133406540 is an abundant number, since it is smaller than the sum of its proper divisors (146747236).

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

133406540 is a wasteful number, since it uses less digits than its factorization.

133406540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670336 (or 6670334 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 133406540 is about 11550.1748904508. The cubic root of 133406540 is about 510.9664360878.

The spelling of 133406540 in words is "one hundred thirty-three million, four hundred six thousand, five hundred forty".