728540103 has 4 divisors (see below), whose sum is σ = 971386808. Its totient is φ = 485693400.

The previous prime is 728540093. The next prime is 728540147. The reversal of 728540103 is 301045827.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 728540103 - 2⁶ = 728540039 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 (728540903) 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, 121423348 + ... + 121423353.

It is an arithmetic number, because the mean of its divisors is an integer number (242846702).

Almost surely, 2^728540103 is an apocalyptic number.

728540103 is a deficient number, since it is larger than the sum of its proper divisors (242846705).

728540103 is a wasteful number, since it uses less digits than its factorization.

728540103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242846704.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 728540103 is about 26991.4820452675. The cubic root of 728540103 is about 899.8107021629.

The spelling of 728540103 in words is "seven hundred twenty-eight million, five hundred forty thousand, one hundred three".