133389928 has 16 divisors (see below), whose sum is σ = 285835680. Its totient is φ = 57167088.

The previous prime is 133389917. The next prime is 133389953. The reversal of 133389928 is 829983331.

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 3 ways as a sum of consecutive naturals, for example, 1190926 + ... + 1191037.

It is an arithmetic number, because the mean of its divisors is an integer number (17864730).

Almost surely, 2^133389928 is an apocalyptic number.

It is an amenable number.

133389928 is an abundant number, since it is smaller than the sum of its proper divisors (152445752).

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

133389928 is a wasteful number, since it uses less digits than its factorization.

133389928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381976 (or 2381972 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 133389928 is about 11549.4557447527. The cubic root of 133389928 is about 510.9452264160.

The spelling of 133389928 in words is "one hundred thirty-three million, three hundred eighty-nine thousand, nine hundred twenty-eight".