28228011520309 has 2 divisors, whose sum is σ = 28228011520310. Its totient is φ = 28228011520308.

The previous prime is 28228011520229. The next prime is 28228011520333. The reversal of 28228011520309 is 90302511082282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28066451737284 + 161559783025 = 5297778^2 + 401945^2 .

It is a cyclic number.

It is not a de Polignac number, because 28228011520309 - 2¹³ = 28228011512117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28228011520609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114005760154 + 14114005760155.

It is an arithmetic number, because the mean of its divisors is an integer number (14114005760155).

Almost surely, 2^{28228011520309} is an apocalyptic number.

It is an amenable number.

28228011520309 is a deficient number, since it is larger than the sum of its proper divisors (1).

28228011520309 is an equidigital number, since it uses as much as digits as its factorization.

28228011520309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 28228011520309 in words is "twenty-eight trillion, two hundred twenty-eight billion, eleven million, five hundred twenty thousand, three hundred nine".