728867 has 2 divisors, whose sum is σ = 728868. Its totient is φ = 728866.

The previous prime is 728851. The next prime is 728869. The reversal of 728867 is 768827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728867 - 2⁴ = 728851 is a prime.

Together with 728869, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728867.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728867.

It is not a weakly prime, because it can be changed into another prime (728869) 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, 364433 + 364434.

It is an arithmetic number, because the mean of its divisors is an integer number (364434).

2⁷²⁸⁸⁶⁷ is an apocalyptic number.

728867 is a deficient number, since it is larger than the sum of its proper divisors (1).

728867 is an equidigital number, since it uses as much as digits as its factorization.

728867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 728867 is about 853.7370789652. The cubic root of 728867 is about 89.9945264161.

The spelling of 728867 in words is "seven hundred twenty-eight thousand, eight hundred sixty-seven".