28680103 has 4 divisors (see below), whose sum is σ = 29927088. Its totient is φ = 27433120.

The previous prime is 28680083. The next prime is 28680107. The reversal of 28680103 is 30108682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30108682 = 2 ⋅15054341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28680103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28680107) 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, 623458 + ... + 623503.

It is an arithmetic number, because the mean of its divisors is an integer number (7481772).

Almost surely, 2^28680103 is an apocalyptic number.

28680103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28680103 is a deficient number, since it is larger than the sum of its proper divisors (1246985).

28680103 is a wasteful number, since it uses less digits than its factorization.

28680103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246984.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28680103 is about 5355.3807521034. The cubic root of 28680103 is about 306.0978192685.

Adding to 28680103 its reverse (30108682), we get a palindrome (58788785).

The spelling of 28680103 in words is "twenty-eight million, six hundred eighty thousand, one hundred three".