728133 has 8 divisors (see below), whose sum is σ = 1109568. Its totient is φ = 416064.

The previous prime is 728131. The next prime is 728173. The reversal of 728133 is 331827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728133 - 2¹ = 728131 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17316 + ... + 17357.

It is an arithmetic number, because the mean of its divisors is an integer number (138696).

2⁷²⁸¹³³ is an apocalyptic number.

It is an amenable number.

728133 is a deficient number, since it is larger than the sum of its proper divisors (381435).

728133 is a wasteful number, since it uses less digits than its factorization.

728133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34683.

The product of its digits is 1008, while the sum is 24.

The square root of 728133 is about 853.3070959508. The cubic root of 728133 is about 89.9643068339.

It can be divided in two parts, 728 and 133, that added together give a triangular number (861 = T₄₁).

The spelling of 728133 in words is "seven hundred twenty-eight thousand, one hundred thirty-three".