28320612103 has 32 divisors (see below), whose sum is σ = 35838526464. Its totient is φ = 21805757952.

The previous prime is 28320612091. The next prime is 28320612107. The reversal of 28320612103 is 30121602382.

It is a cyclic number.

It is not a de Polignac number, because 28320612103 - 2⁵ = 28320612071 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 (28320612107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1267101 + ... + 1289257.

It is an arithmetic number, because the mean of its divisors is an integer number (1119953952).

Almost surely, 2^28320612103 is an apocalyptic number.

28320612103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28320612103 is a deficient number, since it is larger than the sum of its proper divisors (7517914361).

28320612103 is a wasteful number, since it uses less digits than its factorization.

28320612103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22671.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 28320612103 in words is "twenty-eight billion, three hundred twenty million, six hundred twelve thousand, one hundred three".