28784680193 has 2 divisors, whose sum is σ = 28784680194. Its totient is φ = 28784680192.

The previous prime is 28784680163. The next prime is 28784680207. The reversal of 28784680193 is 39108648782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26168562289 + 2616117904 = 161767^2 + 51148^2 .

It is a cyclic number.

It is not a de Polignac number, because 28784680193 - 2¹⁰ = 28784679169 is a prime.

It is not a weakly prime, because it can be changed into another prime (28784680153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14392340096 + 14392340097.

It is an arithmetic number, because the mean of its divisors is an integer number (14392340097).

Almost surely, 2^28784680193 is an apocalyptic number.

It is an amenable number.

28784680193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28784680193 is an equidigital number, since it uses as much as digits as its factorization.

28784680193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 28784680193 in words is "twenty-eight billion, seven hundred eighty-four million, six hundred eighty thousand, one hundred ninety-three".