144705640 has 16 divisors (see below), whose sum is σ = 325587780. Its totient is φ = 57882240.

The previous prime is 144705619. The next prime is 144705641. The reversal of 144705640 is 46507441.

It can be written as a sum of positive squares in 2 ways, for example, as 141943396 + 2762244 = 11914^2 + 1662^2 .

It is not an unprimeable number, because it can be changed into a prime (144705641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808781 + ... + 1808860.

Almost surely, 2^144705640 is an apocalyptic number.

144705640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144705640 is an abundant number, since it is smaller than the sum of its proper divisors (180882140).

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

144705640 is a wasteful number, since it uses less digits than its factorization.

144705640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617652 (or 3617648 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 144705640 is about 12029.3657355656. The cubic root of 144705640 is about 525.0030415546.

The spelling of 144705640 in words is "one hundred forty-four million, seven hundred five thousand, six hundred forty".