728701204817 has 4 divisors (see below), whose sum is σ = 760383865920. Its totient is φ = 697018543716.

The previous prime is 728701204769. The next prime is 728701204871. The reversal of 728701204817 is 718402107827.

It is a happy number.

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 728701204817 - 2¹⁴ = 728701188433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728701203817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15841330517 + ... + 15841330562.

It is an arithmetic number, because the mean of its divisors is an integer number (190095966480).

Almost surely, 2^728701204817 is an apocalyptic number.

It is an amenable number.

728701204817 is a deficient number, since it is larger than the sum of its proper divisors (31682661103).

728701204817 is a wasteful number, since it uses less digits than its factorization.

728701204817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31682661102.

The product of its (nonzero) digits is 351232, while the sum is 47.

The spelling of 728701204817 in words is "seven hundred twenty-eight billion, seven hundred one million, two hundred four thousand, eight hundred seventeen".