728271 has 20 divisors (see below), whose sum is σ = 1121912. Its totient is φ = 472392.

The previous prime is 728269. The next prime is 728281. The reversal of 728271 is 172827.

It is not a de Polignac number, because 728271 - 2¹ = 728269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

728271 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728261) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19665 + ... + 19701.

2⁷²⁸²⁷¹ is an apocalyptic number.

728271 is a deficient number, since it is larger than the sum of its proper divisors (393641).

728271 is an frugal number, since it uses more digits than its factorization.

728271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 40 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 728271 is about 853.3879539811. The cubic root of 728271 is about 89.9699899944.

It can be divided in two parts, 728 and 271, that added together give a palindrome (999).

The spelling of 728271 in words is "seven hundred twenty-eight thousand, two hundred seventy-one".