28663103 has 8 divisors (see below), whose sum is σ = 32796672. Its totient is φ = 24539256.

The previous prime is 28663099. The next prime is 28663109. The reversal of 28663103 is 30136682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28663103 - 2² = 28663099 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 (28663109) 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 7 ways as a sum of consecutive naturals, for example, 5726 + ... + 9492.

It is an arithmetic number, because the mean of its divisors is an integer number (4099584).

Almost surely, 2^28663103 is an apocalyptic number.

28663103 is a deficient number, since it is larger than the sum of its proper divisors (4133569).

28663103 is a wasteful number, since it uses less digits than its factorization.

28663103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 28663103 is about 5353.7933280992. The cubic root of 28663103 is about 306.0373279537.

Adding to 28663103 its reverse (30136682), we get a palindrome (58799785).

The spelling of 28663103 in words is "twenty-eight million, six hundred sixty-three thousand, one hundred three".