144838540 has 96 divisors (see below), whose sum is σ = 382201344. Its totient is φ = 44789760.

The previous prime is 144838513. The next prime is 144838543. The reversal of 144838540 is 45838441.

It is a self number, because there is not a number n which added to its sum of digits gives 144838540.

It is not an unprimeable number, because it can be changed into a prime (144838543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250732 + ... + 251308.

It is an arithmetic number, because the mean of its divisors is an integer number (3981264).

Almost surely, 2^144838540 is an apocalyptic number.

144838540 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 144838540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191100672).

144838540 is an abundant number, since it is smaller than the sum of its proper divisors (237362804).

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

144838540 is a wasteful number, since it uses less digits than its factorization.

144838540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 144838540 is about 12034.8884498362. Note that the first 3 decimals coincide. The cubic root of 144838540 is about 525.1637161372.

Subtracting from 144838540 its reverse (45838441), we obtain a palindrome (99000099).

The spelling of 144838540 in words is "one hundred forty-four million, eight hundred thirty-eight thousand, five hundred forty".