28020086968897 has 4 divisors (see below), whose sum is σ = 28020176982576. Its totient is φ = 28019996955220.

The previous prime is 28020086968879. The next prime is 28020086968919. The reversal of 28020086968897 is 79886968002082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28020086968897 - 2³⁵ = 27985727230529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28020086938897) 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, 44538283 + ... + 45163024.

It is an arithmetic number, because the mean of its divisors is an integer number (7005044245644).

Almost surely, 2^{28020086968897} is an apocalyptic number.

It is an amenable number.

28020086968897 is a deficient number, since it is larger than the sum of its proper divisors (90013679).

28020086968897 is an equidigital number, since it uses as much as digits as its factorization.

28020086968897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90013678.

The product of its (nonzero) digits is 334430208, while the sum is 73.

The spelling of 28020086968897 in words is "twenty-eight trillion, twenty billion, eighty-six million, nine hundred sixty-eight thousand, eight hundred ninety-seven".