28265884019 has 2 divisors, whose sum is σ = 28265884020. Its totient is φ = 28265884018.

The previous prime is 28265883959. The next prime is 28265884091. The reversal of 28265884019 is 91048856282.

Together with next prime (28265884091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28265884019 - 2²⁴ = 28249106803 is a prime.

It is a super-2 number, since 2×28265884019² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28265884319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14132942009 + 14132942010.

It is an arithmetic number, because the mean of its divisors is an integer number (14132942010).

Almost surely, 2^28265884019 is an apocalyptic number.

28265884019 is a deficient number, since it is larger than the sum of its proper divisors (1).

28265884019 is an equidigital number, since it uses as much as digits as its factorization.

28265884019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 28265884019 in words is "twenty-eight billion, two hundred sixty-five million, eight hundred eighty-four thousand, nineteen".