133881968 has 20 divisors (see below), whose sum is σ = 282978168. Its totient is φ = 60855360.

The previous prime is 133881929. The next prime is 133881971. The reversal of 133881968 is 869188331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380171 + ... + 380522.

Almost surely, 2^133881968 is an apocalyptic number.

It is an amenable number.

133881968 is an abundant number, since it is smaller than the sum of its proper divisors (149096200).

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

133881968 is a wasteful number, since it uses less digits than its factorization.

133881968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760712 (or 760706 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The square root of 133881968 is about 11570.7375737245. The cubic root of 133881968 is about 511.5727025736.

The spelling of 133881968 in words is "one hundred thirty-three million, eight hundred eighty-one thousand, nine hundred sixty-eight".