133881912 has 24 divisors (see below), whose sum is σ = 362597040. Its totient is φ = 44627280.

The previous prime is 133881911. The next prime is 133881929. The reversal of 133881912 is 219188331.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133881911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 929664 + ... + 929807.

It is an arithmetic number, because the mean of its divisors is an integer number (15108210).

Almost surely, 2^133881912 is an apocalyptic number.

133881912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133881912 is an abundant number, since it is smaller than the sum of its proper divisors (228715128).

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

133881912 is a wasteful number, since it uses less digits than its factorization.

133881912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859483 (or 1859476 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 133881912 is about 11570.7351538267. The cubic root of 133881912 is about 511.5726312469.

The spelling of 133881912 in words is "one hundred thirty-three million, eight hundred eighty-one thousand, nine hundred twelve".