28308702871 has 4 divisors (see below), whose sum is σ = 28350518472. Its totient is φ = 28266887272.

The previous prime is 28308702839. The next prime is 28308702883. The reversal of 28308702871 is 17820780382.

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 28308702871 - 2⁵ = 28308702839 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 (28308702811) 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, 20906785 + ... + 20908138.

It is an arithmetic number, because the mean of its divisors is an integer number (7087629618).

Almost surely, 2^28308702871 is an apocalyptic number.

28308702871 is a deficient number, since it is larger than the sum of its proper divisors (41815601).

28308702871 is an equidigital number, since it uses as much as digits as its factorization.

28308702871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41815600.

The product of its (nonzero) digits is 301056, while the sum is 46.

The spelling of 28308702871 in words is "twenty-eight billion, three hundred eight million, seven hundred two thousand, eight hundred seventy-one".