728603677 has 4 divisors (see below), whose sum is σ = 728657820. Its totient is φ = 728549536.

The previous prime is 728603671. The next prime is 728603693. The reversal of 728603677 is 776306827.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 519338521 + 209265156 = 22789^2 + 14466^2 .

It is a cyclic number.

It is not a de Polignac number, because 728603677 - 2⁷ = 728603549 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 (728603671) 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, 10449 + ... + 39577.

It is an arithmetic number, because the mean of its divisors is an integer number (182164455).

Almost surely, 2^728603677 is an apocalyptic number.

It is an amenable number.

728603677 is a deficient number, since it is larger than the sum of its proper divisors (54143).

728603677 is a wasteful number, since it uses less digits than its factorization.

728603677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54142.

The product of its (nonzero) digits is 592704, while the sum is 46.

The square root of 728603677 is about 26992.6596874039. The cubic root of 728603677 is about 899.8368745504.

The spelling of 728603677 in words is "seven hundred twenty-eight million, six hundred three thousand, six hundred seventy-seven".