289528890205 has 4 divisors (see below), whose sum is σ = 347434668252. Its totient is φ = 231623112160.

The previous prime is 289528890187. The next prime is 289528890221. The reversal of 289528890205 is 502098825982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129527290201 + 160001600004 = 359899^2 + 400002^2 .

It is not a de Polignac number, because 289528890205 - 2¹¹ = 289528888157 is a prime.

It is a super-4 number, since 4×289528890205⁴ (a number of 47 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 289528890205.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 28952889016 + ... + 28952889025.

It is an arithmetic number, because the mean of its divisors is an integer number (86858667063).

Almost surely, 2^289528890205 is an apocalyptic number.

It is an amenable number.

289528890205 is a deficient number, since it is larger than the sum of its proper divisors (57905778047).

289528890205 is an equidigital number, since it uses as much as digits as its factorization.

289528890205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57905778046.

The product of its (nonzero) digits is 8294400, while the sum is 58.

The spelling of 289528890205 in words is "two hundred eighty-nine billion, five hundred twenty-eight million, eight hundred ninety thousand, two hundred five".