28886704909 has 2 divisors, whose sum is σ = 28886704910. Its totient is φ = 28886704908.

The previous prime is 28886704871. The next prime is 28886704937. The reversal of 28886704909 is 90940768882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16352782884 + 12533922025 = 127878^2 + 111955^2 .

It is a cyclic number.

It is not a de Polignac number, because 28886704909 - 2²³ = 28878316301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28886704949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14443352454 + 14443352455.

It is an arithmetic number, because the mean of its divisors is an integer number (14443352455).

Almost surely, 2^28886704909 is an apocalyptic number.

It is an amenable number.

28886704909 is a deficient number, since it is larger than the sum of its proper divisors (1).

28886704909 is an equidigital number, since it uses as much as digits as its factorization.

28886704909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 28886704909 in words is "twenty-eight billion, eight hundred eighty-six million, seven hundred four thousand, nine hundred nine".