133489944 has 80 divisors (see below), whose sum is σ = 427323600. Its totient is φ = 38138688.

The previous prime is 133489927. The next prime is 133490009. The reversal of 133489944 is 449984331.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 133489944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10179 + ... + 19250.

It is an arithmetic number, because the mean of its divisors is an integer number (5341545).

Almost surely, 2^133489944 is an apocalyptic number.

133489944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

133489944 is an abundant number, since it is smaller than the sum of its proper divisors (293833656).

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

133489944 is a wasteful number, since it uses less digits than its factorization.

133489944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29454 (or 29441 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 133489944 is about 11553.7848344168. The cubic root of 133489944 is about 511.0728970519.

The spelling of 133489944 in words is "one hundred thirty-three million, four hundred eighty-nine thousand, nine hundred forty-four".