28285308287 has 2 divisors, whose sum is σ = 28285308288. Its totient is φ = 28285308286.

The previous prime is 28285308263. The next prime is 28285308323. The reversal of 28285308287 is 78280358282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28285308287 - 2¹⁶ = 28285242751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28285308217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142654143 + 14142654144.

It is an arithmetic number, because the mean of its divisors is an integer number (14142654144).

Almost surely, 2^28285308287 is an apocalyptic number.

28285308287 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285308287 is an equidigital number, since it uses as much as digits as its factorization.

28285308287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3440640, while the sum is 53.

The spelling of 28285308287 in words is "twenty-eight billion, two hundred eighty-five million, three hundred eight thousand, two hundred eighty-seven".