28320641103 has 4 divisors (see below), whose sum is σ = 37760854808. Its totient is φ = 18880427400.

The previous prime is 28320641081. The next prime is 28320641117. The reversal of 28320641103 is 30114602382.

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

It is not a de Polignac number, because 28320641103 - 2⁶ = 28320641039 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 (28320641303) 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, 4720106848 + ... + 4720106853.

It is an arithmetic number, because the mean of its divisors is an integer number (9440213702).

Almost surely, 2^28320641103 is an apocalyptic number.

28320641103 is a deficient number, since it is larger than the sum of its proper divisors (9440213705).

28320641103 is an equidigital number, since it uses as much as digits as its factorization.

28320641103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9440213704.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 28320641103 in words is "twenty-eight billion, three hundred twenty million, six hundred forty-one thousand, one hundred three".