28880887829 has 2 divisors, whose sum is σ = 28880887830. Its totient is φ = 28880887828.

The previous prime is 28880887823. The next prime is 28880887879. The reversal of 28880887829 is 92878808882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28383151729 + 497736100 = 168473^2 + 22310^2 .

It is a cyclic number.

It is not a de Polignac number, because 28880887829 - 2³² = 24585920533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28880887823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14440443914 + 14440443915.

It is an arithmetic number, because the mean of its divisors is an integer number (14440443915).

Almost surely, 2^28880887829 is an apocalyptic number.

It is an amenable number.

28880887829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28880887829 is an equidigital number, since it uses as much as digits as its factorization.

28880887829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66060288, while the sum is 68.

The spelling of 28880887829 in words is "twenty-eight billion, eight hundred eighty million, eight hundred eighty-seven thousand, eight hundred twenty-nine".