728338903 has 4 divisors (see below), whose sum is σ = 729799000. Its totient is φ = 726878808.

The previous prime is 728338867. The next prime is 728338957. The reversal of 728338903 is 309833827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309833827 = 73 ⋅4244299.

It is a cyclic number.

It is not a de Polignac number, because 728338903 - 2²⁵ = 694784471 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 728338903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728338993) 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, 729300 + ... + 730297.

It is an arithmetic number, because the mean of its divisors is an integer number (182449750).

Almost surely, 2^728338903 is an apocalyptic number.

728338903 is a deficient number, since it is larger than the sum of its proper divisors (1460097).

728338903 is a wasteful number, since it uses less digits than its factorization.

728338903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460096.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 728338903 is about 26987.7546861535. The cubic root of 728338903 is about 899.7278613414.

The spelling of 728338903 in words is "seven hundred twenty-eight million, three hundred thirty-eight thousand, nine hundred three".