28907229877 has 2 divisors, whose sum is σ = 28907229878. Its totient is φ = 28907229876.

The previous prime is 28907229853. The next prime is 28907229929. The reversal of 28907229877 is 77892270982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20234778001 + 8672451876 = 142249^2 + 93126^2 .

It is a cyclic number.

It is not a de Polignac number, because 28907229877 - 2²³ = 28898841269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28907229977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14453614938 + 14453614939.

It is an arithmetic number, because the mean of its divisors is an integer number (14453614939).

Almost surely, 2^28907229877 is an apocalyptic number.

It is an amenable number.

28907229877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28907229877 is an equidigital number, since it uses as much as digits as its factorization.

28907229877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14224896, while the sum is 61.

The spelling of 28907229877 in words is "twenty-eight billion, nine hundred seven million, two hundred twenty-nine thousand, eight hundred seventy-seven".