728261517 has 16 divisors (see below), whose sum is σ = 1003225088. Its totient is φ = 469430640.

The previous prime is 728261509. The next prime is 728261519. The reversal of 728261517 is 715162827.

728261517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 728261517 - 2³ = 728261509 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 (728261519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129588 + ... + 135090.

It is an arithmetic number, because the mean of its divisors is an integer number (62701568).

Almost surely, 2^728261517 is an apocalyptic number.

It is an amenable number.

728261517 is a deficient number, since it is larger than the sum of its proper divisors (274963571).

728261517 is a wasteful number, since it uses less digits than its factorization.

728261517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960.

The product of its digits is 47040, while the sum is 39.

The square root of 728261517 is about 26986.3209237569. The cubic root of 728261517 is about 899.6959948545.

The spelling of 728261517 in words is "seven hundred twenty-eight million, two hundred sixty-one thousand, five hundred seventeen".