289861365 has 16 divisors (see below), whose sum is σ = 464574528. Its totient is φ = 154327296.

The previous prime is 289861357. The next prime is 289861381. The reversal of 289861365 is 563168982.

It is a happy number.

It is not a de Polignac number, because 289861365 - 2³ = 289861357 is a prime.

It is a super-2 number, since 2×289861365² = 168039221839326450, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 7399 + ... + 25188.

It is an arithmetic number, because the mean of its divisors is an integer number (29035908).

Almost surely, 2^289861365 is an apocalyptic number.

It is an amenable number.

289861365 is a deficient number, since it is larger than the sum of its proper divisors (174713163).

289861365 is a wasteful number, since it uses less digits than its factorization.

289861365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33188.

The product of its digits is 622080, while the sum is 48.

The square root of 289861365 is about 17025.3154155804. The cubic root of 289861365 is about 661.8051021568.

The spelling of 289861365 in words is "two hundred eighty-nine million, eight hundred sixty-one thousand, three hundred sixty-five".