28603031603 has 4 divisors (see below), whose sum is σ = 28607295360. Its totient is φ = 28598767848.

The previous prime is 28603031593. The next prime is 28603031617. The reversal of 28603031603 is 30613030682.

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 28603031603 - 2¹⁰ = 28603030579 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 28603031603.

It is not an unprimeable number, because it can be changed into a prime (28603031903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2121800 + ... + 2135237.

It is an arithmetic number, because the mean of its divisors is an integer number (7151823840).

Almost surely, 2^28603031603 is an apocalyptic number.

28603031603 is a deficient number, since it is larger than the sum of its proper divisors (4263757).

28603031603 is an equidigital number, since it uses as much as digits as its factorization.

28603031603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263756.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 28603031603 in words is "twenty-eight billion, six hundred three million, thirty-one thousand, six hundred three".