28881784847 has 2 divisors, whose sum is σ = 28881784848. Its totient is φ = 28881784846.

The previous prime is 28881784829. The next prime is 28881784859. The reversal of 28881784847 is 74848718882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28881784847 - 2⁶ = 28881784783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28881784807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14440892423 + 14440892424.

It is an arithmetic number, because the mean of its divisors is an integer number (14440892424).

Almost surely, 2^28881784847 is an apocalyptic number.

28881784847 is a deficient number, since it is larger than the sum of its proper divisors (1).

28881784847 is an equidigital number, since it uses as much as digits as its factorization.

28881784847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51380224, while the sum is 65.

The spelling of 28881784847 in words is "twenty-eight billion, eight hundred eighty-one million, seven hundred eighty-four thousand, eight hundred forty-seven".