28007293797089 has 24 divisors (see below), whose sum is σ = 29820978622488. Its totient is φ = 26298435502080.

The previous prime is 28007293797083. The next prime is 28007293797113. The reversal of 28007293797089 is 98079739270082.

It can be written as a sum of positive squares in 12 ways, for example, as 58096907089 + 27949196890000 = 241033^2 + 5286700^2 .

It is not a de Polignac number, because 28007293797089 - 2³⁶ = 27938574320353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28007293797083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1562810849 + ... + 1562828769.

It is an arithmetic number, because the mean of its divisors is an integer number (1242540775937).

Almost surely, 2^{28007293797089} is an apocalyptic number.

It is an amenable number.

28007293797089 is a deficient number, since it is larger than the sum of its proper divisors (1813684825399).

28007293797089 is a wasteful number, since it uses less digits than its factorization.

28007293797089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30245 (or 30228 counting only the distinct ones).

The product of its (nonzero) digits is 192036096, while the sum is 71.

The spelling of 28007293797089 in words is "twenty-eight trillion, seven billion, two hundred ninety-three million, seven hundred ninety-seven thousand, eighty-nine".