28288769329 has 2 divisors, whose sum is σ = 28288769330. Its totient is φ = 28288769328.

The previous prime is 28288769231. The next prime is 28288769347. The reversal of 28288769329 is 92396788282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25615362304 + 2673407025 = 160048^2 + 51705^2 .

It is a cyclic number.

It is not a de Polignac number, because 28288769329 - 2⁹ = 28288768817 is a prime.

It is a super-2 number, since 2×28288769329² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28288769129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144384664 + 14144384665.

It is an arithmetic number, because the mean of its divisors is an integer number (14144384665).

Almost surely, 2^28288769329 is an apocalyptic number.

It is an amenable number.

28288769329 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288769329 is an equidigital number, since it uses as much as digits as its factorization.

28288769329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41803776, while the sum is 64.

The spelling of 28288769329 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred sixty-nine thousand, three hundred twenty-nine".