1440320269 has 2 divisors, whose sum is σ = 1440320270. Its totient is φ = 1440320268.

The previous prime is 1440320267. The next prime is 1440320333. The reversal of 1440320269 is 9620230441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1356817225 + 83503044 = 36835^2 + 9138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440320269 - 2¹ = 1440320267 is a prime.

It is a super-2 number, since 2×1440320269² = 4149044954584464722, which contains 22 as substring.

Together with 1440320267, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1440320269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440320267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720160134 + 720160135.

It is an arithmetic number, because the mean of its divisors is an integer number (720160135).

Almost surely, 2^1440320269 is an apocalyptic number.

It is an amenable number.

1440320269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440320269 is an equidigital number, since it uses as much as digits as its factorization.

1440320269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1440320269 is about 37951.5516020096. The cubic root of 1440320269 is about 1129.3269464148.

The spelling of 1440320269 in words is "one billion, four hundred forty million, three hundred twenty thousand, two hundred sixty-nine".