28807915769 has 2 divisors, whose sum is σ = 28807915770. Its totient is φ = 28807915768.

The previous prime is 28807915753. The next prime is 28807915837. The reversal of 28807915769 is 96751970882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19912596544 + 8895319225 = 141112^2 + 94315^2 .

It is a cyclic number.

It is not a de Polignac number, because 28807915769 - 2⁴ = 28807915753 is a prime.

It is a super-2 number, since 2×28807915769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28807915739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403957884 + 14403957885.

It is an arithmetic number, because the mean of its divisors is an integer number (14403957885).

Almost surely, 2^28807915769 is an apocalyptic number.

It is an amenable number.

28807915769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28807915769 is an equidigital number, since it uses as much as digits as its factorization.

28807915769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 62.

The spelling of 28807915769 in words is "twenty-eight billion, eight hundred seven million, nine hundred fifteen thousand, seven hundred sixty-nine".