1440024139 has 2 divisors, whose sum is σ = 1440024140. Its totient is φ = 1440024138.

The previous prime is 1440024097. The next prime is 1440024161. The reversal of 1440024139 is 9314200441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440024139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440024169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720012069 + 720012070.

It is an arithmetic number, because the mean of its divisors is an integer number (720012070).

Almost surely, 2^1440024139 is an apocalyptic number.

1440024139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440024139 is an equidigital number, since it uses as much as digits as its factorization.

1440024139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1440024139 is about 37947.6499799395. The cubic root of 1440024139 is about 1129.2495445299.

The spelling of 1440024139 in words is "one billion, four hundred forty million, twenty-four thousand, one hundred thirty-nine".