728935287 has 4 divisors (see below), whose sum is σ = 971913720. Its totient is φ = 485956856.

The previous prime is 728935243. The next prime is 728935301. The reversal of 728935287 is 782539827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782539827 = 3 ⋅260846609.

It is a cyclic number.

It is not a de Polignac number, because 728935287 - 2²⁰ = 727886711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728935217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121489212 + ... + 121489217.

It is an arithmetic number, because the mean of its divisors is an integer number (242978430).

Almost surely, 2^728935287 is an apocalyptic number.

728935287 is a deficient number, since it is larger than the sum of its proper divisors (242978433).

728935287 is a wasteful number, since it uses less digits than its factorization.

728935287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242978432.

The product of its digits is 1693440, while the sum is 51.

The square root of 728935287 is about 26998.8015845148. The cubic root of 728935287 is about 899.9733683478.

The spelling of 728935287 in words is "seven hundred twenty-eight million, nine hundred thirty-five thousand, two hundred eighty-seven".