289108885 has 16 divisors (see below), whose sum is σ = 395596656. Its totient is φ = 200936448.

The previous prime is 289108877. The next prime is 289108889. The reversal of 289108885 is 588801982.

289108885 = T₂₉₅₀ + T₂₉₅₁ + ... + T₃₀₁₄.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1535121 + 287573764 = 1239^2 + 16958^2 .

It is a cyclic number.

It is not a de Polignac number, because 289108885 - 2³ = 289108877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289108889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129714 + ... + 131923.

It is an arithmetic number, because the mean of its divisors is an integer number (24724791).

Almost surely, 2^289108885 is an apocalyptic number.

It is an amenable number.

289108885 is a deficient number, since it is larger than the sum of its proper divisors (106487771).

289108885 is a wasteful number, since it uses less digits than its factorization.

289108885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261672.

The product of its (nonzero) digits is 368640, while the sum is 49.

The square root of 289108885 is about 17003.2021984096. The cubic root of 289108885 is about 661.2319239439.

The spelling of 289108885 in words is "two hundred eighty-nine million, one hundred eight thousand, eight hundred eighty-five".