28234186489 has 2 divisors, whose sum is σ = 28234186490. Its totient is φ = 28234186488.

The previous prime is 28234186457. The next prime is 28234186499. The reversal of 28234186489 is 98468143282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20083708089 + 8150478400 = 141717^2 + 90280^2 .

It is a cyclic number.

It is not a de Polignac number, because 28234186489 - 2⁵ = 28234186457 is a prime.

It is not a weakly prime, because it can be changed into another prime (28234186499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14117093244 + 14117093245.

It is an arithmetic number, because the mean of its divisors is an integer number (14117093245).

Almost surely, 2^28234186489 is an apocalyptic number.

It is an amenable number.

28234186489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28234186489 is an equidigital number, since it uses as much as digits as its factorization.

28234186489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5308416, while the sum is 55.

The spelling of 28234186489 in words is "twenty-eight billion, two hundred thirty-four million, one hundred eighty-six thousand, four hundred eighty-nine".