133028 has 12 divisors (see below), whose sum is σ = 266112. Its totient is φ = 57000.

The previous prime is 133013. The next prime is 133033. The reversal of 133028 is 820331.

133028 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 132997 and 133015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2348 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (22176).

2¹³³⁰²⁸ is an apocalyptic number.

It is an amenable number.

133028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

133028 is a wasteful number, since it uses less digits than its factorization.

133028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762 (or 4760 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 133028 is about 364.7300371508. The cubic root of 133028 is about 51.0482690520.

Adding to 133028 its reverse (820331), we get a palindrome (953359).

The spelling of 133028 in words is "one hundred thirty-three thousand, twenty-eight".