144442040 has 64 divisors (see below), whose sum is σ = 338256000. Its totient is φ = 55444480.

The previous prime is 144442003. The next prime is 144442049. The reversal of 144442040 is 40244441.

144442040 = 1304² + 1305² + ... + 1383².

It is a junction number, because it is equal to n+sod(n) for n = 144441997 and 144442015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144442049) 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, 276980 + ... + 277500.

It is an arithmetic number, because the mean of its divisors is an integer number (5285250).

Almost surely, 2^144442040 is an apocalyptic number.

144442040 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 144442040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169128000).

144442040 is an abundant number, since it is smaller than the sum of its proper divisors (193813960).

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

144442040 is a wasteful number, since it uses less digits than its factorization.

144442040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 144442040 is about 12018.4042201950. The cubic root of 144442040 is about 524.6840608543.

Adding to 144442040 its reverse (40244441), we get a palindrome (184686481).

The spelling of 144442040 in words is "one hundred forty-four million, four hundred forty-two thousand, forty".