28242760769 has 12 divisors (see below), whose sum is σ = 29195093700. Its totient is φ = 27320572800.

The previous prime is 28242760751. The next prime is 28242760811. The reversal of 28242760769 is 96706724282.

It can be written as a sum of positive squares in 2 ways, for example, as 4714882225 + 23527878544 = 68665^2 + 153388^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28242760769 is a prime.

It is a super-2 number, since 2×28242760769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28242760769.

It is not an unprimeable number, because it can be changed into a prime (28242768769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3310229 + ... + 3318749.

It is an arithmetic number, because the mean of its divisors is an integer number (2432924475).

Almost surely, 2^28242760769 is an apocalyptic number.

It is an amenable number.

28242760769 is a deficient number, since it is larger than the sum of its proper divisors (952332931).

28242760769 is an equidigital number, since it uses as much as digits as its factorization.

28242760769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12032 (or 12001 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 28242760769 in words is "twenty-eight billion, two hundred forty-two million, seven hundred sixty thousand, seven hundred sixty-nine".