28289552069 has 2 divisors, whose sum is σ = 28289552070. Its totient is φ = 28289552068.

The previous prime is 28289552063. The next prime is 28289552087. The reversal of 28289552069 is 96025598282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17272530625 + 11017021444 = 131425^2 + 104962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28289552069 is a prime.

It is a super-2 number, since 2×28289552069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28289552063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144776034 + 14144776035.

It is an arithmetic number, because the mean of its divisors is an integer number (14144776035).

Almost surely, 2^28289552069 is an apocalyptic number.

It is an amenable number.

28289552069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28289552069 is an equidigital number, since it uses as much as digits as its factorization.

28289552069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 28289552069 in words is "twenty-eight billion, two hundred eighty-nine million, five hundred fifty-two thousand, sixty-nine".