144640440 has 96 divisors (see below), whose sum is σ = 537245280. Its totient is φ = 33060096.

The previous prime is 144640439. The next prime is 144640453. The reversal of 144640440 is 44046441.

144640440 is a `hidden beast` number, since 14 + 4 + 640 + 4 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26179 + ... + 31218.

It is an arithmetic number, because the mean of its divisors is an integer number (5596305).

Almost surely, 2^144640440 is an apocalyptic number.

144640440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144640440 is an abundant number, since it is smaller than the sum of its proper divisors (392604840).

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

144640440 is a wasteful number, since it uses less digits than its factorization.

144640440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57421 (or 57414 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 144640440 is about 12026.6553954123. The cubic root of 144640440 is about 524.9241795267.

Adding to 144640440 its reverse (44046441), we get a palindrome (188686881).

The spelling of 144640440 in words is "one hundred forty-four million, six hundred forty thousand, four hundred forty".