28512103 has 8 divisors (see below), whose sum is σ = 30148400. Its totient is φ = 26889408.

The previous prime is 28512101. The next prime is 28512131. The reversal of 28512103 is 30121582.

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

It is not a de Polignac number, because 28512103 - 2¹ = 28512101 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 (28512101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (3768550).

Almost surely, 2^28512103 is an apocalyptic number.

28512103 is a deficient number, since it is larger than the sum of its proper divisors (1636297).

28512103 is a wasteful number, since it uses less digits than its factorization.

28512103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 28512103 is about 5339.6725555038. The cubic root of 28512103 is about 305.4989700518.

Adding to 28512103 its reverse (30121582), we get a palindrome (58633685).

The spelling of 28512103 in words is "twenty-eight million, five hundred twelve thousand, one hundred three".