1440488669 has 2 divisors, whose sum is σ = 1440488670. Its totient is φ = 1440488668.

The previous prime is 1440488657. The next prime is 1440488719. The reversal of 1440488669 is 9668840441.

It is an a-pointer prime, because the next prime (1440488719) can be obtained adding 1440488669 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994645444 + 445843225 = 31538^2 + 21115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440488669 - 2⁴ = 1440488653 is a prime.

It is a super-2 number, since 2×1440488669² = 4150015211034783122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440482669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720244334 + 720244335.

It is an arithmetic number, because the mean of its divisors is an integer number (720244335).

Almost surely, 2^1440488669 is an apocalyptic number.

It is an amenable number.

1440488669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440488669 is an equidigital number, since it uses as much as digits as its factorization.

1440488669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The square root of 1440488669 is about 37953.7701552823. The cubic root of 1440488669 is about 1129.3709577481.

The spelling of 1440488669 in words is "one billion, four hundred forty million, four hundred eighty-eight thousand, six hundred sixty-nine".