1440240089 has 2 divisors, whose sum is σ = 1440240090. Its totient is φ = 1440240088.

The previous prime is 1440240049. The next prime is 1440240121. The reversal of 1440240089 is 9800420441.

It is an a-pointer prime, because the next prime (1440240121) can be obtained adding 1440240089 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1247502400 + 192737689 = 35320^2 + 13883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440240089 is a prime.

It is a super-3 number, since 3×1440240089³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1440240019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720120044 + 720120045.

It is an arithmetic number, because the mean of its divisors is an integer number (720120045).

Almost surely, 2^1440240089 is an apocalyptic number.

It is an amenable number.

1440240089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440240089 is an equidigital number, since it uses as much as digits as its factorization.

1440240089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1440240089 is about 37950.4952405104. The cubic root of 1440240089 is about 1129.3059901694.

The spelling of 1440240089 in words is "one billion, four hundred forty million, two hundred forty thousand, eighty-nine".