289220544 has 98 divisors (see below), whose sum is σ = 860628200. Its totient is φ = 96391296.

The previous prime is 289220539. The next prime is 289220557. The reversal of 289220544 is 445022982.

289220544 is a `hidden beast` number, since 2 + 8 + 92 + 20 + 544 = 666.

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

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 289220499 and 289220508.

It is a congruent number.

It is an unprimeable number.

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 13 ways as a sum of consecutive naturals, for example, 43557 + ... + 49755.

Almost surely, 2^289220544 is an apocalyptic number.

289220544 is a gapful number since it is divisible by the number (24) 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 289220544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430314100).

289220544 is an abundant number, since it is smaller than the sum of its proper divisors (571407656).

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

289220544 is an frugal number, since it uses more digits than its factorization.

289220544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229 (or 6204 counting only the distinct ones).

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

The square root of 289220544 is about 17006.4853511829. The cubic root of 289220544 is about 661.3170395020.

It can be divided in two parts, 2892 and 20544, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 289220544 in words is "two hundred eighty-nine million, two hundred twenty thousand, five hundred forty-four".