28527819389 has 2 divisors, whose sum is σ = 28527819390. Its totient is φ = 28527819388.

The previous prime is 28527819329. The next prime is 28527819421. The reversal of 28527819389 is 98391872582.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27740568025 + 787251364 = 166555^2 + 28058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28527819389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28527819329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14263909694 + 14263909695.

It is an arithmetic number, because the mean of its divisors is an integer number (14263909695).

Almost surely, 2^28527819389 is an apocalyptic number.

It is an amenable number.

28527819389 is a deficient number, since it is larger than the sum of its proper divisors (1).

28527819389 is an equidigital number, since it uses as much as digits as its factorization.

28527819389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 62.

The spelling of 28527819389 in words is "twenty-eight billion, five hundred twenty-seven million, eight hundred nineteen thousand, three hundred eighty-nine".