728663039 has 16 divisors (see below), whose sum is σ = 799696800. Its totient is φ = 659819136.

The previous prime is 728663017. The next prime is 728663041. The reversal of 728663039 is 930366827.

It is a cyclic number.

It is not a de Polignac number, because 728663039 - 2¹² = 728658943 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 (728665039) 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, 592277 + ... + 593505.

It is an arithmetic number, because the mean of its divisors is an integer number (49981050).

Almost surely, 2^728663039 is an apocalyptic number.

728663039 is a deficient number, since it is larger than the sum of its proper divisors (71033761).

728663039 is a wasteful number, since it uses less digits than its factorization.

728663039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 728663039 is about 26993.7592602438. The cubic root of 728663039 is about 899.8613115513.

The spelling of 728663039 in words is "seven hundred twenty-eight million, six hundred sixty-three thousand, thirty-nine".