28808103 has 4 divisors (see below), whose sum is σ = 38410808. Its totient is φ = 19205400.

The previous prime is 28808099. The next prime is 28808137. The reversal of 28808103 is 30180882.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28808103 - 2² = 28808099 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 (28806103) 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, 4801348 + ... + 4801353.

It is an arithmetic number, because the mean of its divisors is an integer number (9602702).

Almost surely, 2^28808103 is an apocalyptic number.

28808103 is a deficient number, since it is larger than the sum of its proper divisors (9602705).

28808103 is an equidigital number, since it uses as much as digits as its factorization.

28808103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9602704.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28808103 is about 5367.3180453556. The cubic root of 28808103 is about 306.5525175087.

Adding to 28808103 its reverse (30180882), we get a palindrome (58988985).

The spelling of 28808103 in words is "twenty-eight million, eight hundred eight thousand, one hundred three".