28300503 has 32 divisors (see below), whose sum is σ = 47549952. Its totient is φ = 14544000.

The previous prime is 28300483. The next prime is 28300513. The reversal of 28300503 is 30500382.

It is not a de Polignac number, because 28300503 - 2⁸ = 28300247 is a prime.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 28300503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28300513) 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 31 ways as a sum of consecutive naturals, for example, 22725 + ... + 23937.

It is an arithmetic number, because the mean of its divisors is an integer number (1485936).

Almost surely, 2^28300503 is an apocalyptic number.

28300503 is a deficient number, since it is larger than the sum of its proper divisors (19249449).

28300503 is a wasteful number, since it uses less digits than its factorization.

28300503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 28300503 is about 5319.8217075387. The cubic root of 28300503 is about 304.7413483945.

Adding to 28300503 its reverse (30500382), we get a palindrome (58800885).

The spelling of 28300503 in words is "twenty-eight million, three hundred thousand, five hundred three".