133280128 has 32 divisors (see below), whose sum is σ = 266067000. Its totient is φ = 66502656.

The previous prime is 133280113. The next prime is 133280131. The reversal of 133280128 is 821082331.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 133280096 and 133280105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93888 + ... + 95296.

Almost surely, 2^133280128 is an apocalyptic number.

It is an amenable number.

133280128 is a deficient number, since it is larger than the sum of its proper divisors (132786872).

133280128 is an equidigital number, since it uses as much as digits as its factorization.

133280128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162 (or 2150 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 133280128 is about 11544.7012953995. The cubic root of 133280128 is about 510.8049929737.

The spelling of 133280128 in words is "one hundred thirty-three million, two hundred eighty thousand, one hundred twenty-eight".