144440 has 32 divisors (see below), whose sum is σ = 341280. Its totient is φ = 54912.

The previous prime is 144439. The next prime is 144451. The reversal of 144440 is 44441.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842 + ... + 998.

It is an arithmetic number, because the mean of its divisors is an integer number (10665).

2¹⁴⁴⁴⁴⁰ is an apocalyptic number.

144440 is a gapful number since it is divisible by the number (10) 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 144440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170640).

144440 is an abundant number, since it is smaller than the sum of its proper divisors (196840).

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

144440 is a wasteful number, since it uses less digits than its factorization.

144440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 144440 is about 380.0526279346. The cubic root of 144440 is about 52.4681590750.

Adding to 144440 its reverse (44441), we get a palindrome (188881).

Subtracting from 144440 its reverse (44441), we obtain a palindrome (99999).

The spelling of 144440 in words is "one hundred forty-four thousand, four hundred forty", and thus it is an iban number.