133953728 has 56 divisors (see below), whose sum is σ = 277392384. Its totient is φ = 64108800.

The previous prime is 133953719. The next prime is 133953731. The reversal of 133953728 is 827359331.

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, 211973 + ... + 212603.

Almost surely, 2^133953728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133953728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138696192).

133953728 is an abundant number, since it is smaller than the sum of its proper divisors (143438656).

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

133953728 is a wasteful number, since it uses less digits than its factorization.

133953728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 771 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 133953728 is about 11573.8380842312. The cubic root of 133953728 is about 511.6640863021.

The spelling of 133953728 in words is "one hundred thirty-three million, nine hundred fifty-three thousand, seven hundred twenty-eight".