133508406 has 16 divisors (see below), whose sum is σ = 268083648. Its totient is φ = 44325000.

The previous prime is 133508393. The next prime is 133508407. The reversal of 133508406 is 604805331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133508407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42820 + ... + 45831.

It is an arithmetic number, because the mean of its divisors is an integer number (16755228).

Almost surely, 2^133508406 is an apocalyptic number.

133508406 is an abundant number, since it is smaller than the sum of its proper divisors (134575242).

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

133508406 is a wasteful number, since it uses less digits than its factorization.

133508406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88907.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 133508406 is about 11554.5837657615. The cubic root of 133508406 is about 511.0964568612.

The spelling of 133508406 in words is "one hundred thirty-three million, five hundred eight thousand, four hundred six".