133909788 has 24 divisors (see below), whose sum is σ = 313770240. Its totient is φ = 44448880.

The previous prime is 133909759. The next prime is 133909807. The reversal of 133909788 is 887909331.

It is a congruent number.

It is an unprimeable number.

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, 20478 + ... + 26213.

It is an arithmetic number, because the mean of its divisors is an integer number (13073760).

Almost surely, 2^133909788 is an apocalyptic number.

It is an amenable number.

133909788 is an abundant number, since it is smaller than the sum of its proper divisors (179860452).

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

133909788 is a wasteful number, since it uses less digits than its factorization.

133909788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46937 (or 46935 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 133909788 is about 11571.9396818338. The cubic root of 133909788 is about 511.6081341983.

The spelling of 133909788 in words is "one hundred thirty-three million, nine hundred nine thousand, seven hundred eighty-eight".