144440440 has 64 divisors (see below), whose sum is σ = 337075200. Its totient is φ = 55665792.

The previous prime is 144440431. The next prime is 144440441. The reversal of 144440440 is 44044441.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144440441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135349 + ... + 136411.

It is an arithmetic number, because the mean of its divisors is an integer number (5266800).

Almost surely, 2^144440440 is an apocalyptic number.

144440440 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 144440440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168537600).

144440440 is an abundant number, since it is smaller than the sum of its proper divisors (192634760).

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

144440440 is a wasteful number, since it uses less digits than its factorization.

144440440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 144440440 is about 12018.3376554331. The cubic root of 144440440 is about 524.6821235199.

Adding to 144440440 its reverse (44044441), we get a palindrome (188484881).

The spelling of 144440440 in words is "one hundred forty-four million, four hundred forty thousand, four hundred forty".