728680273 has 4 divisors (see below), whose sum is σ = 760362048. Its totient is φ = 696998500.

The previous prime is 728680261. The next prime is 728680283. The reversal of 728680273 is 372086827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 728680273 - 2²⁵ = 695125841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728680213) 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, 15840853 + ... + 15840898.

It is an arithmetic number, because the mean of its divisors is an integer number (190090512).

Almost surely, 2^728680273 is an apocalyptic number.

It is an amenable number.

728680273 is a deficient number, since it is larger than the sum of its proper divisors (31681775).

728680273 is a wasteful number, since it uses less digits than its factorization.

728680273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31681774.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 728680273 is about 26994.0784802890. The cubic root of 728680273 is about 899.8684058627.

The spelling of 728680273 in words is "seven hundred twenty-eight million, six hundred eighty thousand, two hundred seventy-three".