28869715829 has 2 divisors, whose sum is σ = 28869715830. Its totient is φ = 28869715828.

The previous prime is 28869715801. The next prime is 28869715837. The reversal of 28869715829 is 92851796882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18445714225 + 10424001604 = 135815^2 + 102098^2 .

It is a cyclic number.

It is not a de Polignac number, because 28869715829 - 2⁸ = 28869715573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28869714829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14434857914 + 14434857915.

It is an arithmetic number, because the mean of its divisors is an integer number (14434857915).

Almost surely, 2^28869715829 is an apocalyptic number.

It is an amenable number.

28869715829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28869715829 is an equidigital number, since it uses as much as digits as its factorization.

28869715829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34836480, while the sum is 65.

The spelling of 28869715829 in words is "twenty-eight billion, eight hundred sixty-nine million, seven hundred fifteen thousand, eight hundred twenty-nine".