144535440 has 160 divisors (see below), whose sum is σ = 515681280. Its totient is φ = 32804352.

The previous prime is 144535439. The next prime is 144535459. The reversal of 144535440 is 44535441.

144535440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 144535398 and 144535407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381171 + ... + 381549.

It is an arithmetic number, because the mean of its divisors is an integer number (3223008).

Almost surely, 2^144535440 is an apocalyptic number.

144535440 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 144535440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257840640).

144535440 is an abundant number, since it is smaller than the sum of its proper divisors (371145840).

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

144535440 is a wasteful number, since it uses less digits than its factorization.

144535440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 144535440 is about 12022.2892994637. The cubic root of 144535440 is about 524.7971279649.

Subtracting from 144535440 its reverse (44535441), we obtain a palindrome (99999999).

The spelling of 144535440 in words is "one hundred forty-four million, five hundred thirty-five thousand, four hundred forty".