28881784859 has 2 divisors, whose sum is σ = 28881784860. Its totient is φ = 28881784858.

The previous prime is 28881784847. The next prime is 28881784873. The reversal of 28881784859 is 95848718882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28881784859 - 2²⁴ = 28865007643 is a prime.

It is not a weakly prime, because it can be changed into another prime (28881784829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14440892429 + 14440892430.

It is an arithmetic number, because the mean of its divisors is an integer number (14440892430).

Almost surely, 2^28881784859 is an apocalyptic number.

28881784859 is a deficient number, since it is larger than the sum of its proper divisors (1).

28881784859 is an equidigital number, since it uses as much as digits as its factorization.

28881784859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82575360, while the sum is 68.

The spelling of 28881784859 in words is "twenty-eight billion, eight hundred eighty-one million, seven hundred eighty-four thousand, eight hundred fifty-nine".