28686354941 has 2 divisors, whose sum is σ = 28686354942. Its totient is φ = 28686354940.

The previous prime is 28686354911. The next prime is 28686354973. The reversal of 28686354941 is 14945368682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27870966916 + 815388025 = 166946^2 + 28555^2 .

It is a cyclic number.

It is not a de Polignac number, because 28686354941 - 2¹⁴ = 28686338557 is a prime.

It is a super-2 number, since 2×28686354941² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28686354911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14343177470 + 14343177471.

It is an arithmetic number, because the mean of its divisors is an integer number (14343177471).

Almost surely, 2^28686354941 is an apocalyptic number.

It is an amenable number.

28686354941 is a deficient number, since it is larger than the sum of its proper divisors (1).

28686354941 is an equidigital number, since it uses as much as digits as its factorization.

28686354941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 56.

The spelling of 28686354941 in words is "twenty-eight billion, six hundred eighty-six million, three hundred fifty-four thousand, nine hundred forty-one".