144424240 has 20 divisors (see below), whose sum is σ = 335786544. Its totient is φ = 57769664.

The previous prime is 144424223. The next prime is 144424261. The reversal of 144424240 is 42424441.

144424240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×144424240² = 41716722199155200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902572 + ... + 902731.

Almost surely, 2^144424240 is an apocalyptic number.

144424240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144424240 is an abundant number, since it is smaller than the sum of its proper divisors (191362304).

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

144424240 is a wasteful number, since it uses less digits than its factorization.

144424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805316 (or 1805310 counting only the distinct ones).

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

The square root of 144424240 is about 12017.6636664536. The cubic root of 144424240 is about 524.6625072033.

Adding to 144424240 its reverse (42424441), we get a palindrome (186848681).

The spelling of 144424240 in words is "one hundred forty-four million, four hundred twenty-four thousand, two hundred forty".