28783854587 has 2 divisors, whose sum is σ = 28783854588. Its totient is φ = 28783854586.

The previous prime is 28783854571. The next prime is 28783854647. The reversal of 28783854587 is 78545838782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28783854587 - 2⁴ = 28783854571 is a prime.

It is not a weakly prime, because it can be changed into another prime (28783854887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14391927293 + 14391927294.

It is an arithmetic number, because the mean of its divisors is an integer number (14391927294).

Almost surely, 2^28783854587 is an apocalyptic number.

28783854587 is a deficient number, since it is larger than the sum of its proper divisors (1).

28783854587 is an equidigital number, since it uses as much as digits as its factorization.

28783854587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120422400, while the sum is 65.

The spelling of 28783854587 in words is "twenty-eight billion, seven hundred eighty-three million, eight hundred fifty-four thousand, five hundred eighty-seven".