Base | Representation |
---|---|
bin | 10110001111011101101 |
3 | 1101000202002 |
4 | 2301323231 |
5 | 141310223 |
6 | 23342045 |
7 | 6123551 |
oct | 2617355 |
9 | 1330662 |
10 | 728813 |
11 | 458628 |
12 | 2b1925 |
13 | 1c6967 |
14 | 14d861 |
15 | e5e28 |
hex | b1eed |
728813 has 2 divisors, whose sum is σ = 728814. Its totient is φ = 728812.
The previous prime is 728809. The next prime is 728831. The reversal of 728813 is 318827.
Together with next prime (728831) it forms an Ormiston pair, because they use the same digits, order apart.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 702244 + 26569 = 838^2 + 163^2 .
It is a cyclic number.
It is not a de Polignac number, because 728813 - 22 = 728809 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (728843) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364406 + 364407.
It is an arithmetic number, because the mean of its divisors is an integer number (364407).
2728813 is an apocalyptic number.
It is an amenable number.
728813 is a deficient number, since it is larger than the sum of its proper divisors (1).
728813 is an equidigital number, since it uses as much as digits as its factorization.
728813 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2688, while the sum is 29.
The square root of 728813 is about 853.7054527177. The cubic root of 728813 is about 89.9923038687.
The spelling of 728813 in words is "seven hundred twenty-eight thousand, eight hundred thirteen".
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