28085420047 has 4 divisors (see below), whose sum is σ = 28089177760. Its totient is φ = 28081662336.

The previous prime is 28085420039. The next prime is 28085420053. The reversal of 28085420047 is 74002458082.

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 28085420047 - 2³ = 28085420039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28085419991 and 28085420009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28085450047) 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, 1867623 + ... + 1882600.

It is an arithmetic number, because the mean of its divisors is an integer number (7022294440).

Almost surely, 2^28085420047 is an apocalyptic number.

28085420047 is a deficient number, since it is larger than the sum of its proper divisors (3757713).

28085420047 is an equidigital number, since it uses as much as digits as its factorization.

28085420047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757712.

The product of its (nonzero) digits is 143360, while the sum is 40.

The spelling of 28085420047 in words is "twenty-eight billion, eighty-five million, four hundred twenty thousand, forty-seven".