728871 has 16 divisors (see below), whose sum is σ = 1142400. Its totient is φ = 407520.

The previous prime is 728869. The next prime is 728873. The reversal of 728871 is 178827.

It is an interprime number because it is at equal distance from previous prime (728869) and next prime (728873).

It is not a de Polignac number, because 728871 - 2¹ = 728869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421 + ... + 1278.

It is an arithmetic number, because the mean of its divisors is an integer number (71400).

2⁷²⁸⁸⁷¹ is an apocalyptic number.

728871 is a deficient number, since it is larger than the sum of its proper divisors (413529).

728871 is a wasteful number, since it uses less digits than its factorization.

728871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726.

The product of its digits is 6272, while the sum is 33.

The square root of 728871 is about 853.7394216036. The cubic root of 728871 is about 89.9946910449.

The spelling of 728871 in words is "seven hundred twenty-eight thousand, eight hundred seventy-one".