728730901 has 4 divisors (see below), whose sum is σ = 728829900. Its totient is φ = 728631904.

The previous prime is 728730887. The next prime is 728730913. The reversal of 728730901 is 109037827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109037827 = 19 ⋅5738833.

It can be written as a sum of positive squares in 2 ways, for example, as 498450276 + 230280625 = 22326^2 + 15175^2 .

It is a cyclic number.

It is not a de Polignac number, because 728730901 - 2¹⁹ = 728206613 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 (728730931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37486 + ... + 53503.

It is an arithmetic number, because the mean of its divisors is an integer number (182207475).

Almost surely, 2^728730901 is an apocalyptic number.

It is an amenable number.

728730901 is a deficient number, since it is larger than the sum of its proper divisors (98999).

728730901 is an equidigital number, since it uses as much as digits as its factorization.

728730901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98998.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 728730901 is about 26995.0162252220. The cubic root of 728730901 is about 899.8892460420.

The spelling of 728730901 in words is "seven hundred twenty-eight million, seven hundred thirty thousand, nine hundred one".