28874388929 has 2 divisors, whose sum is σ = 28874388930. Its totient is φ = 28874388928.

The previous prime is 28874388859. The next prime is 28874388937. The reversal of 28874388929 is 92988347882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15690067600 + 13184321329 = 125260^2 + 114823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28874388929 is a prime.

It is not a weakly prime, because it can be changed into another prime (28874388989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437194464 + 14437194465.

It is an arithmetic number, because the mean of its divisors is an integer number (14437194465).

Almost surely, 2^28874388929 is an apocalyptic number.

It is an amenable number.

28874388929 is a deficient number, since it is larger than the sum of its proper divisors (1).

28874388929 is an equidigital number, since it uses as much as digits as its factorization.

28874388929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 111476736, while the sum is 68.

The spelling of 28874388929 in words is "twenty-eight billion, eight hundred seventy-four million, three hundred eighty-eight thousand, nine hundred twenty-nine".