28723811863 has 2 divisors, whose sum is σ = 28723811864. Its totient is φ = 28723811862.

The previous prime is 28723811839. The next prime is 28723811867. The reversal of 28723811863 is 36811832782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28723811863 - 2¹³ = 28723803671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28723811867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14361905931 + 14361905932.

It is an arithmetic number, because the mean of its divisors is an integer number (14361905932).

Almost surely, 2^28723811863 is an apocalyptic number.

28723811863 is a deficient number, since it is larger than the sum of its proper divisors (1).

28723811863 is an equidigital number, since it uses as much as digits as its factorization.

28723811863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The spelling of 28723811863 in words is "twenty-eight billion, seven hundred twenty-three million, eight hundred eleven thousand, eight hundred sixty-three".