28318486871 has 4 divisors (see below), whose sum is σ = 28404041544. Its totient is φ = 28232932200.

The previous prime is 28318486849. The next prime is 28318486877. The reversal of 28318486871 is 17868481382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28318486871 - 2²⁶ = 28251378007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318486877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42776840 + ... + 42777501.

It is an arithmetic number, because the mean of its divisors is an integer number (7101010386).

Almost surely, 2^28318486871 is an apocalyptic number.

28318486871 is a deficient number, since it is larger than the sum of its proper divisors (85554673).

28318486871 is an equidigital number, since it uses as much as digits as its factorization.

28318486871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85554672.

The product of its digits is 4128768, while the sum is 56.

The spelling of 28318486871 in words is "twenty-eight billion, three hundred eighteen million, four hundred eighty-six thousand, eight hundred seventy-one".