28534431769 has 2 divisors, whose sum is σ = 28534431770. Its totient is φ = 28534431768.

The previous prime is 28534431733. The next prime is 28534431811. The reversal of 28534431769 is 96713443582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15847788544 + 12686643225 = 125888^2 + 112635^2 .

It is a cyclic number.

It is not a de Polignac number, because 28534431769 - 2⁷ = 28534431641 is a prime.

It is a super-2 number, since 2×28534431769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28534431719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14267215884 + 14267215885.

It is an arithmetic number, because the mean of its divisors is an integer number (14267215885).

Almost surely, 2^28534431769 is an apocalyptic number.

It is an amenable number.

28534431769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28534431769 is an equidigital number, since it uses as much as digits as its factorization.

28534431769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 52.

The spelling of 28534431769 in words is "twenty-eight billion, five hundred thirty-four million, four hundred thirty-one thousand, seven hundred sixty-nine".