144452220 has 144 divisors (see below), whose sum is σ = 451259424. Its totient is φ = 34496000.

The previous prime is 144452207. The next prime is 144452221. The reversal of 144452220 is 22254441.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144452221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 733162 + ... + 733358.

It is an arithmetic number, because the mean of its divisors is an integer number (3133746).

Almost surely, 2^144452220 is an apocalyptic number.

144452220 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 144452220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225629712).

144452220 is an abundant number, since it is smaller than the sum of its proper divisors (306807204).

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

144452220 is a wasteful number, since it uses less digits than its factorization.

144452220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 319 counting only the distinct ones).

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

The square root of 144452220 is about 12018.8277298578. The cubic root of 144452220 is about 524.6963868093.

The spelling of 144452220 in words is "one hundred forty-four million, four hundred fifty-two thousand, two hundred twenty".