289544220 has 168 divisors, whose sum is σ = 1042249824. Its totient is φ = 66158208.

The previous prime is 289544219. The next prime is 289544237. The reversal of 289544220 is 22445982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 100642 + ... + 103478.

It is an arithmetic number, because the mean of its divisors is an integer number (6203868).

Almost surely, 2^289544220 is an apocalyptic number.

289544220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289544220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521124912).

289544220 is an abundant number, since it is smaller than the sum of its proper divisors (752705604).

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

289544220 is a wasteful number, since it uses less digits than its factorization.

289544220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 289544220 is about 17015.9989421720. The cubic root of 289544220 is about 661.5636479088.

Adding to 289544220 its sum of digits (36), we get a square (289544256 = 17016²).

The spelling of 289544220 in words is "two hundred eighty-nine million, five hundred forty-four thousand, two hundred twenty".