28097916089 has 4 divisors (see below), whose sum is σ = 28376113380. Its totient is φ = 27819718800.

The previous prime is 28097916083. The next prime is 28097916109. The reversal of 28097916089 is 98061979082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98061979082 = 2 ⋅49030989541.

It can be written as a sum of positive squares in 2 ways, for example, as 20451288064 + 7646628025 = 143008^2 + 87445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28097916089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28097916083) 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, 139098494 + ... + 139098695.

It is an arithmetic number, because the mean of its divisors is an integer number (7094028345).

Almost surely, 2^28097916089 is an apocalyptic number.

It is an amenable number.

28097916089 is a deficient number, since it is larger than the sum of its proper divisors (278197291).

28097916089 is a wasteful number, since it uses less digits than its factorization.

28097916089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278197290.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 28097916089 in words is "twenty-eight billion, ninety-seven million, nine hundred sixteen thousand, eighty-nine".