28321238677 has 2 divisors, whose sum is σ = 28321238678. Its totient is φ = 28321238676.

The previous prime is 28321238657. The next prime is 28321238681. The reversal of 28321238677 is 77683212382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16197907441 + 12123331236 = 127271^2 + 110106^2 .

It is a cyclic number.

It is not a de Polignac number, because 28321238677 - 2⁷ = 28321238549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28321238677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28321238657) 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, 14160619338 + 14160619339.

It is an arithmetic number, because the mean of its divisors is an integer number (14160619339).

Almost surely, 2^28321238677 is an apocalyptic number.

It is an amenable number.

28321238677 is a deficient number, since it is larger than the sum of its proper divisors (1).

28321238677 is an equidigital number, since it uses as much as digits as its factorization.

28321238677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 49.

The spelling of 28321238677 in words is "twenty-eight billion, three hundred twenty-one million, two hundred thirty-eight thousand, six hundred seventy-seven".