144440520 has 128 divisors (see below), whose sum is σ = 497629440. Its totient is φ = 32855040.

The previous prime is 144440479. The next prime is 144440521. The reversal of 144440520 is 25044441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (144440521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 313090 + ... + 313550.

It is an arithmetic number, because the mean of its divisors is an integer number (3887730).

Almost surely, 2^144440520 is an apocalyptic number.

144440520 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 144440520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248814720).

144440520 is an abundant number, since it is smaller than the sum of its proper divisors (353188920).

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

144440520 is a wasteful number, since it uses less digits than its factorization.

144440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 144440520 is about 12018.3409836799. The cubic root of 144440520 is about 524.6822203870.

Adding to 144440520 its reverse (25044441), we get a palindrome (169484961).

The spelling of 144440520 in words is "one hundred forty-four million, four hundred forty thousand, five hundred twenty".