28798534789 has 2 divisors, whose sum is σ = 28798534790. Its totient is φ = 28798534788.

The previous prime is 28798534757. The next prime is 28798534799. The reversal of 28798534789 is 98743589782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28229712289 + 568822500 = 168017^2 + 23850^2 .

It is a cyclic number.

It is not a de Polignac number, because 28798534789 - 2⁵ = 28798534757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28798534729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14399267394 + 14399267395.

It is an arithmetic number, because the mean of its divisors is an integer number (14399267395).

Almost surely, 2^28798534789 is an apocalyptic number.

It is an amenable number.

28798534789 is a deficient number, since it is larger than the sum of its proper divisors (1).

28798534789 is an equidigital number, since it uses as much as digits as its factorization.

28798534789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243855360, while the sum is 70.

The spelling of 28798534789 in words is "twenty-eight billion, seven hundred ninety-eight million, five hundred thirty-four thousand, seven hundred eighty-nine".