728649811 has 2 divisors, whose sum is σ = 728649812. Its totient is φ = 728649810.

The previous prime is 728649809. The next prime is 728649839. The reversal of 728649811 is 118946827.

728649811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728649811 - 2¹ = 728649809 is a prime.

Together with 728649809, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_37658278 and since 728649811 and 37658278 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (728649841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364324905 + 364324906.

It is an arithmetic number, because the mean of its divisors is an integer number (364324906).

Almost surely, 2^728649811 is an apocalyptic number.

728649811 is a deficient number, since it is larger than the sum of its proper divisors (1).

728649811 is an equidigital number, since it uses as much as digits as its factorization.

728649811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 728649811 is about 26993.5142395354. The cubic root of 728649811 is about 899.8558662188.

The spelling of 728649811 in words is "seven hundred twenty-eight million, six hundred forty-nine thousand, eight hundred eleven".