28766377069 has 2 divisors, whose sum is σ = 28766377070. Its totient is φ = 28766377068.

The previous prime is 28766377063. The next prime is 28766377091. The reversal of 28766377069 is 96077366782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27535419844 + 1230957225 = 165938^2 + 35085^2 .

It is a cyclic number.

It is not a de Polignac number, because 28766377069 - 2³ = 28766377061 is a prime.

It is a super-2 number, since 2×28766377069² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28766376998 and 28766377016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28766377061) 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, 14383188534 + 14383188535.

It is an arithmetic number, because the mean of its divisors is an integer number (14383188535).

Almost surely, 2^28766377069 is an apocalyptic number.

It is an amenable number.

28766377069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28766377069 is an equidigital number, since it uses as much as digits as its factorization.

28766377069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 61.

The spelling of 28766377069 in words is "twenty-eight billion, seven hundred sixty-six million, three hundred seventy-seven thousand, sixty-nine".