728987663 has 8 divisors (see below), whose sum is σ = 732847632. Its totient is φ = 725138496.

The previous prime is 728987641. The next prime is 728987681. The reversal of 728987663 is 366789827.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728987663 - 2¹⁴ = 728971279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728987599 and 728987608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728980663) 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 in 7 ways as a sum of consecutive naturals, for example, 156281 + ... + 160877.

It is an arithmetic number, because the mean of its divisors is an integer number (91605954).

Almost surely, 2^728987663 is an apocalyptic number.

728987663 is a deficient number, since it is larger than the sum of its proper divisors (3859969).

728987663 is a wasteful number, since it uses less digits than its factorization.

728987663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401.

The product of its digits is 6096384, while the sum is 56.

The square root of 728987663 is about 26999.7715360704. The cubic root of 728987663 is about 899.9949230166.

The spelling of 728987663 in words is "seven hundred twenty-eight million, nine hundred eighty-seven thousand, six hundred sixty-three".