728734671 has 32 divisors (see below), whose sum is σ = 1260103680. Its totient is φ = 407554848.

The previous prime is 728734667. The next prime is 728734687. The reversal of 728734671 is 176437827.

It is not a de Polignac number, because 728734671 - 2² = 728734667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728734621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32136 + ... + 49901.

It is an arithmetic number, because the mean of its divisors is an integer number (39378240).

Almost surely, 2^728734671 is an apocalyptic number.

728734671 is a deficient number, since it is larger than the sum of its proper divisors (531369009).

728734671 is a wasteful number, since it uses less digits than its factorization.

728734671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82100 (or 82094 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 728734671 is about 26995.0860528356. The cubic root of 728734671 is about 899.8907978615.

The spelling of 728734671 in words is "seven hundred twenty-eight million, seven hundred thirty-four thousand, six hundred seventy-one".