28668415103 has 4 divisors (see below), whose sum is σ = 30354792480. Its totient is φ = 26982037728.

The previous prime is 28668415099. The next prime is 28668415141. The reversal of 28668415103 is 30151486682.

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

It is a cyclic number.

It is not a de Polignac number, because 28668415103 - 2² = 28668415099 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 (28068415103) 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, 843188663 + ... + 843188696.

It is an arithmetic number, because the mean of its divisors is an integer number (7588698120).

Almost surely, 2^28668415103 is an apocalyptic number.

28668415103 is a deficient number, since it is larger than the sum of its proper divisors (1686377377).

28668415103 is a wasteful number, since it uses less digits than its factorization.

28668415103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686377376.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 28668415103 in words is "twenty-eight billion, six hundred sixty-eight million, four hundred fifteen thousand, one hundred three".