144424420 has 72 divisors (see below), whose sum is σ = 354908736. Its totient is φ = 48359616.

The previous prime is 144424391. The next prime is 144424421. The reversal of 144424420 is 24424441.

It is not an unprimeable number, because it can be changed into a prime (144424421) 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, 309027 + ... + 309493.

It is an arithmetic number, because the mean of its divisors is an integer number (4929288).

Almost surely, 2^144424420 is an apocalyptic number.

144424420 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 144424420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177454368).

144424420 is an abundant number, since it is smaller than the sum of its proper divisors (210484316).

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

144424420 is a wasteful number, since it uses less digits than its factorization.

144424420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 528 counting only the distinct ones).

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

The square root of 144424420 is about 12017.6711554277. The cubic root of 144424420 is about 524.6627251705.

Adding to 144424420 its reverse (24424441), we get a palindrome (168848861).

The spelling of 144424420 in words is "one hundred forty-four million, four hundred twenty-four thousand, four hundred twenty".