728719877 has 4 divisors (see below), whose sum is σ = 729071136. Its totient is φ = 728368620.

The previous prime is 728719837. The next prime is 728719897. The reversal of 728719877 is 778917827.

728719877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 778917827 = 103 ⋅7562309.

It is a cyclic number.

It is not a de Polignac number, because 728719877 - 2¹² = 728715781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728719837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172499 + ... + 176672.

It is an arithmetic number, because the mean of its divisors is an integer number (182267784).

Almost surely, 2^728719877 is an apocalyptic number.

It is an amenable number.

728719877 is a deficient number, since it is larger than the sum of its proper divisors (351259).

728719877 is a wasteful number, since it uses less digits than its factorization.

728719877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351258.

The product of its digits is 2765952, while the sum is 56.

The square root of 728719877 is about 26994.8120386122. The cubic root of 728719877 is about 899.8847082768.

The spelling of 728719877 in words is "seven hundred twenty-eight million, seven hundred nineteen thousand, eight hundred seventy-seven".