289742271 has 64 divisors (see below), whose sum is σ = 508032000. Its totient is φ = 142534656.

The previous prime is 289742261. The next prime is 289742279. The reversal of 289742271 is 172247982.

It is not a de Polignac number, because 289742271 - 2⁵ = 289742239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289742279) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 691300 + ... + 691718.

It is an arithmetic number, because the mean of its divisors is an integer number (7938000).

Almost surely, 2^289742271 is an apocalyptic number.

289742271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

289742271 is a deficient number, since it is larger than the sum of its proper divisors (218289729).

289742271 is a wasteful number, since it uses less digits than its factorization.

289742271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608.

The product of its digits is 112896, while the sum is 42.

The square root of 289742271 is about 17021.8174999029. The cubic root of 289742271 is about 661.7144521390.

The spelling of 289742271 in words is "two hundred eighty-nine million, seven hundred forty-two thousand, two hundred seventy-one".