728730887 has 2 divisors, whose sum is σ = 728730888. Its totient is φ = 728730886.

The previous prime is 728730853. The next prime is 728730913. The reversal of 728730887 is 788037827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728730887 - 2⁸ = 728730631 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728730287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364365443 + 364365444.

It is an arithmetic number, because the mean of its divisors is an integer number (364365444).

Almost surely, 2^728730887 is an apocalyptic number.

728730887 is a deficient number, since it is larger than the sum of its proper divisors (1).

728730887 is an equidigital number, since it uses as much as digits as its factorization.

728730887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1053696, while the sum is 50.

The square root of 728730887 is about 26995.0159659149. The cubic root of 728730887 is about 899.8892402792.

The spelling of 728730887 in words is "seven hundred twenty-eight million, seven hundred thirty thousand, eight hundred eighty-seven".