28769322097 has 4 divisors (see below), whose sum is σ = 28769694196. Its totient is φ = 28768950000.

The previous prime is 28769322031. The next prime is 28769322107. The reversal of 28769322097 is 79022396782.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28397642256 + 371679841 = 168516^2 + 19279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28769322097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28769322497) 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, 21654 + ... + 240847.

It is an arithmetic number, because the mean of its divisors is an integer number (7192423549).

Almost surely, 2^28769322097 is an apocalyptic number.

It is an amenable number.

28769322097 is a deficient number, since it is larger than the sum of its proper divisors (372099).

28769322097 is a wasteful number, since it uses less digits than its factorization.

28769322097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372098.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 28769322097 in words is "twenty-eight billion, seven hundred sixty-nine million, three hundred twenty-two thousand, ninety-seven".