728669318 has 16 divisors (see below), whose sum is σ = 1181110896. Its totient is φ = 335157600.

The previous prime is 728669303. The next prime is 728669327. The reversal of 728669318 is 813966827.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40208 + ... + 55443.

It is an arithmetic number, because the mean of its divisors is an integer number (73819431).

Almost surely, 2^728669318 is an apocalyptic number.

728669318 is a deficient number, since it is larger than the sum of its proper divisors (452441578).

728669318 is a wasteful number, since it uses less digits than its factorization.

728669318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95959.

The product of its digits is 870912, while the sum is 50.

The square root of 728669318 is about 26993.8755646535. The cubic root of 728669318 is about 899.8638962910.

The spelling of 728669318 in words is "seven hundred twenty-eight million, six hundred sixty-nine thousand, three hundred eighteen".