289445288 has 48 divisors (see below), whose sum is σ = 613323360. Its totient is φ = 126996800.

The previous prime is 289445287. The next prime is 289445291. The reversal of 289445288 is 882544982.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (289445287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72053 + ... + 75963.

It is an arithmetic number, because the mean of its divisors is an integer number (12777570).

Almost surely, 2^289445288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289445288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306661680).

289445288 is an abundant number, since it is smaller than the sum of its proper divisors (323878072).

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

289445288 is a wasteful number, since it uses less digits than its factorization.

289445288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986 (or 3953 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 50.

The square root of 289445288 is about 17013.0916649503. The cubic root of 289445288 is about 661.4882912321.

The spelling of 289445288 in words is "two hundred eighty-nine million, four hundred forty-five thousand, two hundred eighty-eight".