320144244 has 72 divisors (see below), whose sum is σ = 875437920. Its totient is φ = 90788544.

The previous prime is 320144189. The next prime is 320144249. The reversal of 320144244 is 442441023.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320144249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79774 + ... + 83690.

It is an arithmetic number, because the mean of its divisors is an integer number (12158860).

Almost surely, 2^320144244 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 320144244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437718960).

320144244 is an abundant number, since it is smaller than the sum of its proper divisors (555293676).

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

320144244 is a wasteful number, since it uses less digits than its factorization.

320144244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077 (or 4068 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 320144244 is about 17892.5751081280. The cubic root of 320144244 is about 684.0931356369.

Adding to 320144244 its reverse (442441023), we get a palindrome (762585267).

The spelling of 320144244 in words is "three hundred twenty million, one hundred forty-four thousand, two hundred forty-four".