28260006660289 has 8 divisors (see below), whose sum is σ = 29073520941192. Its totient is φ = 27452408847360.

The previous prime is 28260006660287. The next prime is 28260006660299. The reversal of 28260006660289 is 98206660006282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 594163472400 + 27665843187889 = 770820^2 + 5259833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28260006660289 - 2¹ = 28260006660287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28260006660283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1479107304 + ... + 1479126409.

It is an arithmetic number, because the mean of its divisors is an integer number (3634190117649).

Almost surely, 2^{28260006660289} is an apocalyptic number.

It is an amenable number.

28260006660289 is a deficient number, since it is larger than the sum of its proper divisors (813514280903).

28260006660289 is a wasteful number, since it uses less digits than its factorization.

28260006660289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958233987.

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 28260006660289 in words is "twenty-eight trillion, two hundred sixty billion, six million, six hundred sixty thousand, two hundred eighty-nine".