728143 has 8 divisors (see below), whose sum is σ = 795200. Its totient is φ = 662688.

The previous prime is 728131. The next prime is 728173. The reversal of 728143 is 341827.

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

It is not a de Polignac number, because 728143 - 2¹³ = 719951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (99400).

2⁷²⁸¹⁴³ is an apocalyptic number.

728143 is a deficient number, since it is larger than the sum of its proper divisors (67057).

728143 is a wasteful number, since it uses less digits than its factorization.

728143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its digits is 1344, while the sum is 25.

The square root of 728143 is about 853.3129554859. The cubic root of 728143 is about 89.9647186813.

The spelling of 728143 in words is "seven hundred twenty-eight thousand, one hundred forty-three".