28228197377 has 2 divisors, whose sum is σ = 28228197378. Its totient is φ = 28228197376.

The previous prime is 28228197359. The next prime is 28228197391. The reversal of 28228197377 is 77379182282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27917063056 + 311134321 = 167084^2 + 17639^2 .

It is a cyclic number.

It is not a de Polignac number, because 28228197377 - 2¹⁴ = 28228180993 is a prime.

It is a super-2 number, since 2×28228197377² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28228197577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114098688 + 14114098689.

It is an arithmetic number, because the mean of its divisors is an integer number (14114098689).

Almost surely, 2^28228197377 is an apocalyptic number.

It is an amenable number.

28228197377 is a deficient number, since it is larger than the sum of its proper divisors (1).

28228197377 is an equidigital number, since it uses as much as digits as its factorization.

28228197377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 56.

The spelling of 28228197377 in words is "twenty-eight billion, two hundred twenty-eight million, one hundred ninety-seven thousand, three hundred seventy-seven".