728963787 has 4 divisors (see below), whose sum is σ = 971951720. Its totient is φ = 485975856.

The previous prime is 728963777. The next prime is 728963801. The reversal of 728963787 is 787369827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787369827 = 3 ⋅262456609.

It is not a de Polignac number, because 728963787 - 2²⁸ = 460528331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728963707) 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 3 ways as a sum of consecutive naturals, for example, 121493962 + ... + 121493967.

It is an arithmetic number, because the mean of its divisors is an integer number (242987930).

Almost surely, 2^728963787 is an apocalyptic number.

728963787 is a deficient number, since it is larger than the sum of its proper divisors (242987933).

728963787 is a wasteful number, since it uses less digits than its factorization.

728963787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242987932.

The product of its digits is 7112448, while the sum is 57.

The square root of 728963787 is about 26999.3293805605. The cubic root of 728963787 is about 899.9850972841.

The spelling of 728963787 in words is "seven hundred twenty-eight million, nine hundred sixty-three thousand, seven hundred eighty-seven".