728357803 has 4 divisors (see below), whose sum is σ = 751853248. Its totient is φ = 704862360.

The previous prime is 728357797. The next prime is 728357849. The reversal of 728357803 is 308753827.

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

It is a cyclic number.

It is not a de Polignac number, because 728357803 - 2²⁵ = 694803371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728357803.

It is not an unprimeable number, because it can be changed into a prime (728351803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11747676 + ... + 11747737.

It is an arithmetic number, because the mean of its divisors is an integer number (187963312).

Almost surely, 2^728357803 is an apocalyptic number.

728357803 is a deficient number, since it is larger than the sum of its proper divisors (23495445).

728357803 is a wasteful number, since it uses less digits than its factorization.

728357803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23495444.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 728357803 is about 26988.1048426895. The cubic root of 728357803 is about 899.7356437576.

The spelling of 728357803 in words is "seven hundred twenty-eight million, three hundred fifty-seven thousand, eight hundred three".