28854457871 has 2 divisors, whose sum is σ = 28854457872. Its totient is φ = 28854457870.

The previous prime is 28854457861. The next prime is 28854457981. The reversal of 28854457871 is 17875445882.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28854457871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28854457871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28854457861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14427228935 + 14427228936.

It is an arithmetic number, because the mean of its divisors is an integer number (14427228936).

Almost surely, 2^28854457871 is an apocalyptic number.

28854457871 is a deficient number, since it is larger than the sum of its proper divisors (1).

28854457871 is an equidigital number, since it uses as much as digits as its factorization.

28854457871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20070400, while the sum is 59.

The spelling of 28854457871 in words is "twenty-eight billion, eight hundred fifty-four million, four hundred fifty-seven thousand, eight hundred seventy-one".