289187968644 has 27 divisors (see below), whose sum is σ = 731011076887. Its totient is φ = 96394914024.

The previous prime is 289187968621. The next prime is 289187968673. The reversal of 289187968644 is 446869781982.

The square root of 289187968644 is 537762.

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

289187968644 is a `hidden beast` number, since 289 + 187 + 96 + 86 + 4 + 4 = 666.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 3181759 + ... + 3271385.

Almost surely, 2^289187968644 is an apocalyptic number.

289187968644 is the 537762-nd square number.

It is an amenable number.

289187968644 is an abundant number, since it is smaller than the sum of its proper divisors (441823108243).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289187968644 is an frugal number, since it uses more digits than its factorization.

289187968644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179264 (or 89632 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 72.

The spelling of 289187968644 in words is "two hundred eighty-nine billion, one hundred eighty-seven million, nine hundred sixty-eight thousand, six hundred forty-four".