728851 has 2 divisors, whose sum is σ = 728852. Its totient is φ = 728850.

The previous prime is 728843. The next prime is 728867. The reversal of 728851 is 158827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728851 - 2³ = 728843 is a prime.

It is not a weakly prime, because it can be changed into another prime (728831) 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, 364425 + 364426.

It is an arithmetic number, because the mean of its divisors is an integer number (364426).

2⁷²⁸⁸⁵¹ is an apocalyptic number.

728851 is a deficient number, since it is larger than the sum of its proper divisors (1).

728851 is an equidigital number, since it uses as much as digits as its factorization.

728851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 31.

The square root of 728851 is about 853.7277083473. The cubic root of 728851 is about 89.9938678950.

The spelling of 728851 in words is "seven hundred twenty-eight thousand, eight hundred fifty-one".