289081281 has 16 divisors (see below), whose sum is σ = 390862080. Its totient is φ = 190020240.

The previous prime is 289081249. The next prime is 289081321. The reversal of 289081281 is 182180982.

It is not a de Polignac number, because 289081281 - 2⁵ = 289081249 is a prime.

It is a super-2 number, since 2×289081281² = 167135974049201922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (289081211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183226 + ... + 184796.

It is an arithmetic number, because the mean of its divisors is an integer number (24428880).

Almost surely, 2^289081281 is an apocalyptic number.

It is an amenable number.

289081281 is a deficient number, since it is larger than the sum of its proper divisors (101780799).

289081281 is a wasteful number, since it uses less digits than its factorization.

289081281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 289081281 is about 17002.3904495809. The cubic root of 289081281 is about 661.2108785548.

The spelling of 289081281 in words is "two hundred eighty-nine million, eighty-one thousand, two hundred eighty-one".