28105669093 has 4 divisors (see below), whose sum is σ = 28107910368. Its totient is φ = 28103427820.

The previous prime is 28105669063. The next prime is 28105669129. The reversal of 28105669093 is 39096650182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28105669093 - 2⁵ = 28105669061 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 (28105669063) 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, 1101721 + ... + 1126942.

It is an arithmetic number, because the mean of its divisors is an integer number (7026977592).

Almost surely, 2^28105669093 is an apocalyptic number.

It is an amenable number.

28105669093 is a deficient number, since it is larger than the sum of its proper divisors (2241275).

28105669093 is a wasteful number, since it uses less digits than its factorization.

28105669093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241274.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 28105669093 in words is "twenty-eight billion, one hundred five million, six hundred sixty-nine thousand, ninety-three".