28500003 has 24 divisors (see below), whose sum is σ = 47699808. Its totient is φ = 16060032.

The previous prime is 28499971. The next prime is 28500023. The reversal of 28500003 is 30000582.

It is not a de Polignac number, because 28500003 - 2⁵ = 28499971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28500023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1501 + ... + 7697.

It is an arithmetic number, because the mean of its divisors is an integer number (1987492).

Almost surely, 2^28500003 is an apocalyptic number.

28500003 is a deficient number, since it is larger than the sum of its proper divisors (19199805).

28500003 is a wasteful number, since it uses less digits than its factorization.

28500003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6283 (or 6280 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 28500003 is about 5338.5394069914. The cubic root of 28500003 is about 305.4557479322.

Adding to 28500003 its reverse (30000582), we get a palindrome (58500585).

The spelling of 28500003 in words is "twenty-eight million, five hundred thousand, three".