320144489 has 6 divisors (see below), whose sum is σ = 372413034. Its totient is φ = 274409520.

The previous prime is 320144483. The next prime is 320144501. The reversal of 320144489 is 984441023.

It can be written as a sum of positive squares in only one way, i.e., 301369600 + 18774889 = 17360^2 + 4333^2 .

It is not a de Polignac number, because 320144489 - 2¹² = 320140393 is a prime.

It is a super-2 number, since 2×320144489² = 204984987674142242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320144483) 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 5 ways as a sum of consecutive naturals, for example, 3266732 + ... + 3266829.

It is an arithmetic number, because the mean of its divisors is an integer number (62068839).

Almost surely, 2^320144489 is an apocalyptic number.

It is an amenable number.

320144489 is a deficient number, since it is larger than the sum of its proper divisors (52268545).

320144489 is an equidigital number, since it uses as much as digits as its factorization.

320144489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6533575 (or 6533568 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 320144489 is about 17892.5819545419. The cubic root of 320144489 is about 684.0933101445.

The spelling of 320144489 in words is "three hundred twenty million, one hundred forty-four thousand, four hundred eighty-nine".