28039323077089 has 3 divisors (see below), whose sum is σ = 28039328372307. Its totient is φ = 28039317781872.

The previous prime is 28039323077083. The next prime is 28039323077113. The reversal of 28039323077089 is 98077032393082.

The square root of 28039323077089 is 5295217.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 26872041630625 + 1167281446464 = 5183825^2 + 1080408^2 .

It is not a de Polignac number, because 28039323077089 - 2³ = 28039323077081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28039323077081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2647609 + ... + 7942825.

It is an arithmetic number, because the mean of its divisors is an integer number (9346442790769).

Almost surely, 2^{28039323077089} is an apocalyptic number.

28039323077089 is the 5295217-th square number.

28039323077089 is the 2647609-th centered octagonal number.

It is an amenable number.

28039323077089 is a deficient number, since it is larger than the sum of its proper divisors (5295218).

28039323077089 is an frugal number, since it uses more digits than its factorization.

28039323077089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10590434 (or 5295217 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 28039323077089 in words is "twenty-eight trillion, thirty-nine billion, three hundred twenty-three million, seventy-seven thousand, eighty-nine".