28600559689 has 9 divisors (see below), whose sum is σ = 30972217653. Its totient is φ = 26398487232.

The previous prime is 28600559683. The next prime is 28600559693. The reversal of 28600559689 is 98695500682.

The square root of 28600559689 is 169117.

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

It can be written as a sum of positive squares in 4 ways, for example, as 12240103225 + 16360456464 = 110635^2 + 127908^2 .

It is not a de Polignac number, because 28600559689 - 2³ = 28600559681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28600559681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2192017 + ... + 2205025.

It is an arithmetic number, because the mean of its divisors is an integer number (3441357517).

Almost surely, 2^28600559689 is an apocalyptic number.

28600559689 is the 169117-th square number.

28600559689 is the 84559-th centered octagonal number.

It is an amenable number.

28600559689 is a deficient number, since it is larger than the sum of its proper divisors (2371657964).

28600559689 is an frugal number, since it uses more digits than its factorization.

28600559689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26044 (or 13022 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 58.

It can be divided in two parts, 28600 and 559689, that added together give a square (588289 = 767²).

The spelling of 28600559689 in words is "twenty-eight billion, six hundred million, five hundred fifty-nine thousand, six hundred eighty-nine".