728205761 has 8 divisors (see below), whose sum is σ = 811622880. Its totient is φ = 649297728.

The previous prime is 728205757. The next prime is 728205767. The reversal of 728205761 is 167502827.

728205761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 728205761 - 2² = 728205757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728205767) 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, 1126931 + ... + 1127576.

It is an arithmetic number, because the mean of its divisors is an integer number (101452860).

Almost surely, 2^728205761 is an apocalyptic number.

It is an amenable number.

728205761 is a deficient number, since it is larger than the sum of its proper divisors (83417119).

728205761 is a wasteful number, since it uses less digits than its factorization.

728205761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254543.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 728205761 is about 26985.2878620926. The cubic root of 728205761 is about 899.6730339039.

The spelling of 728205761 in words is "seven hundred twenty-eight million, two hundred five thousand, seven hundred sixty-one".