28857623827 has 2 divisors, whose sum is σ = 28857623828. Its totient is φ = 28857623826.

The previous prime is 28857623771. The next prime is 28857623843. The reversal of 28857623827 is 72832675882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28857623827 is a prime.

It is not a weakly prime, because it can be changed into another prime (28857623027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428811913 + 14428811914.

It is an arithmetic number, because the mean of its divisors is an integer number (14428811914).

Almost surely, 2^28857623827 is an apocalyptic number.

28857623827 is a deficient number, since it is larger than the sum of its proper divisors (1).

28857623827 is an equidigital number, since it uses as much as digits as its factorization.

28857623827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18063360, while the sum is 58.

The spelling of 28857623827 in words is "twenty-eight billion, eight hundred fifty-seven million, six hundred twenty-three thousand, eight hundred twenty-seven".