728628319 has 2 divisors, whose sum is σ = 728628320. Its totient is φ = 728628318.

The previous prime is 728628317. The next prime is 728628353. The reversal of 728628319 is 913826827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728628319 - 2¹ = 728628317 is a prime.

It is a super-2 number, since 2×728628319² = 1061798454497531522, which contains 22 as substring.

Together with 728628317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728628317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364314159 + 364314160.

It is an arithmetic number, because the mean of its divisors is an integer number (364314160).

Almost surely, 2^728628319 is an apocalyptic number.

728628319 is a deficient number, since it is larger than the sum of its proper divisors (1).

728628319 is an equidigital number, since it uses as much as digits as its factorization.

728628319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 728628319 is about 26993.1161409719. The cubic root of 728628319 is about 899.8470188539.

The spelling of 728628319 in words is "seven hundred twenty-eight million, six hundred twenty-eight thousand, three hundred nineteen".