133657628 has 24 divisors (see below), whose sum is σ = 265152720. Its totient is φ = 58440960.

The previous prime is 133657603. The next prime is 133657633. The reversal of 133657628 is 826756331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66653 + ... + 68628.

It is an arithmetic number, because the mean of its divisors is an integer number (11048030).

Almost surely, 2^133657628 is an apocalyptic number.

It is an amenable number.

133657628 is a deficient number, since it is larger than the sum of its proper divisors (131495092).

133657628 is a wasteful number, since it uses less digits than its factorization.

133657628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135317 (or 135315 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 133657628 is about 11561.0392266439. The cubic root of 133657628 is about 511.2868030249.

The spelling of 133657628 in words is "one hundred thirty-three million, six hundred fifty-seven thousand, six hundred twenty-eight".