728748671 has 8 divisors (see below), whose sum is σ = 833177760. Its totient is φ = 624400128.

The previous prime is 728748661. The next prime is 728748679. The reversal of 728748671 is 176847827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728748671 - 2⁶ = 728748607 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 (728748679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695 + ... + 38183.

It is an arithmetic number, because the mean of its divisors is an integer number (104147220).

Almost surely, 2^728748671 is an apocalyptic number.

728748671 is a deficient number, since it is larger than the sum of its proper divisors (104429089).

728748671 is a wasteful number, since it uses less digits than its factorization.

728748671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40273.

The product of its digits is 1053696, while the sum is 50.

The square root of 728748671 is about 26995.3453580427. The cubic root of 728748671 is about 899.8965605399.

The spelling of 728748671 in words is "seven hundred twenty-eight million, seven hundred forty-eight thousand, six hundred seventy-one".