144740385 has 64 divisors (see below), whose sum is σ = 274924800. Its totient is φ = 72036864.

The previous prime is 144740381. The next prime is 144740413. The reversal of 144740385 is 583047441.

It is not a de Polignac number, because 144740385 - 2² = 144740381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144740381) 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 63 ways as a sum of consecutive naturals, for example, 186859 + ... + 187631.

It is an arithmetic number, because the mean of its divisors is an integer number (4295700).

Almost surely, 2^144740385 is an apocalyptic number.

144740385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144740385 is a deficient number, since it is larger than the sum of its proper divisors (130184415).

144740385 is a wasteful number, since it uses less digits than its factorization.

144740385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 144740385 is about 12030.8098231166. The cubic root of 144740385 is about 525.0450573574.

The spelling of 144740385 in words is "one hundred forty-four million, seven hundred forty thousand, three hundred eighty-five".