220643489 has 8 divisors (see below), whose sum is σ = 243086400. Its totient is φ = 198598000.

The previous prime is 220643473. The next prime is 220643491. The reversal of 220643489 is 984346022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220643489 - 2⁴ = 220643473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220643429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98189 + ... + 100410.

It is an arithmetic number, because the mean of its divisors is an integer number (30385800).

Almost surely, 2^220643489 is an apocalyptic number.

It is an amenable number.

220643489 is a deficient number, since it is larger than the sum of its proper divisors (22442911).

220643489 is a wasteful number, since it uses less digits than its factorization.

220643489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198711.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 220643489 is about 14854.0731451006. The cubic root of 220643489 is about 604.2690797412.

The spelling of 220643489 in words is "two hundred twenty million, six hundred forty-three thousand, four hundred eighty-nine".