28761959869 has 2 divisors, whose sum is σ = 28761959870. Its totient is φ = 28761959868.

The previous prime is 28761959843. The next prime is 28761959893. The reversal of 28761959869 is 96895916782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28491752025 + 270207844 = 168795^2 + 16438^2 .

It is a cyclic number.

It is not a de Polignac number, because 28761959869 - 2⁷ = 28761959741 is a prime.

It is a super-2 number, since 2×28761959869² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28761959798 and 28761959807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28761959969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380979934 + 14380979935.

It is an arithmetic number, because the mean of its divisors is an integer number (14380979935).

Almost surely, 2^28761959869 is an apocalyptic number.

It is an amenable number.

28761959869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28761959869 is an equidigital number, since it uses as much as digits as its factorization.

28761959869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 70.

The spelling of 28761959869 in words is "twenty-eight billion, seven hundred sixty-one million, nine hundred fifty-nine thousand, eight hundred sixty-nine".