728771 has 2 divisors, whose sum is σ = 728772. Its totient is φ = 728770.

The previous prime is 728747. The next prime is 728809. The reversal of 728771 is 177827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728771 - 2¹⁰ = 727747 is a prime.

It is a super-2 number, since 2×728771² = 1062214340882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728701) 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 as a sum of consecutive naturals, namely, 364385 + 364386.

It is an arithmetic number, because the mean of its divisors is an integer number (364386).

2⁷²⁸⁷⁷¹ is an apocalyptic number.

728771 is a deficient number, since it is larger than the sum of its proper divisors (1).

728771 is an equidigital number, since it uses as much as digits as its factorization.

728771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5488, while the sum is 32.

The square root of 728771 is about 853.6808537153. The cubic root of 728771 is about 89.9905751447.

The spelling of 728771 in words is "seven hundred twenty-eight thousand, seven hundred seventy-one".