144640140 has 48 divisors (see below), whose sum is σ = 405888000. Its totient is φ = 38485440.

The previous prime is 144640129. The next prime is 144640157. The reversal of 144640140 is 41046441.

It is a self number, because there is not a number n which added to its sum of digits gives 144640140.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27525 + ... + 32355.

It is an arithmetic number, because the mean of its divisors is an integer number (8456000).

Almost surely, 2^144640140 is an apocalyptic number.

144640140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144640140 is an abundant number, since it is smaller than the sum of its proper divisors (261247860).

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

144640140 is a wasteful number, since it uses less digits than its factorization.

144640140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5342 (or 5340 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 144640140 is about 12026.6429231103. The cubic root of 144640140 is about 524.9238166099.

Adding to 144640140 its reverse (41046441), we get a palindrome (185686581).

It can be divided in two parts, 1446401 and 40, that added together give a palindrome (1446441).

The spelling of 144640140 in words is "one hundred forty-four million, six hundred forty thousand, one hundred forty".