1440286349 has 2 divisors, whose sum is σ = 1440286350. Its totient is φ = 1440286348.

The previous prime is 1440286271. The next prime is 1440286357. The reversal of 1440286349 is 9436820441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1339926025 + 100360324 = 36605^2 + 10018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440286349 - 2¹⁶ = 1440220813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440286399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720143174 + 720143175.

It is an arithmetic number, because the mean of its divisors is an integer number (720143175).

Almost surely, 2^1440286349 is an apocalyptic number.

It is an amenable number.

1440286349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440286349 is an equidigital number, since it uses as much as digits as its factorization.

1440286349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 1440286349 is about 37951.1047138288. The cubic root of 1440286349 is about 1129.3180810090.

The spelling of 1440286349 in words is "one billion, four hundred forty million, two hundred eighty-six thousand, three hundred forty-nine".