28874084861 has 2 divisors, whose sum is σ = 28874084862. Its totient is φ = 28874084860.

The previous prime is 28874084819. The next prime is 28874084867. The reversal of 28874084861 is 16848047882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17156022361 + 11718062500 = 130981^2 + 108250^2 .

It is a cyclic number.

It is not a de Polignac number, because 28874084861 - 2¹⁸ = 28873822717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28874084797 and 28874084806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28874084867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437042430 + 14437042431.

It is an arithmetic number, because the mean of its divisors is an integer number (14437042431).

Almost surely, 2^28874084861 is an apocalyptic number.

It is an amenable number.

28874084861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28874084861 is an equidigital number, since it uses as much as digits as its factorization.

28874084861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5505024, while the sum is 56.

The spelling of 28874084861 in words is "twenty-eight billion, eight hundred seventy-four million, eighty-four thousand, eight hundred sixty-one".