1440040445 has 4 divisors (see below), whose sum is σ = 1728048540. Its totient is φ = 1152032352.

The previous prime is 1440040439. The next prime is 1440040451. The reversal of 1440040445 is 5440400441.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1440040439) and next prime (1440040451).

It can be written as a sum of positive squares in 2 ways, for example, as 327284281 + 1112756164 = 18091^2 + 33358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440040445 - 2¹² = 1440036349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144004040 + ... + 144004049.

It is an arithmetic number, because the mean of its divisors is an integer number (432012135).

Almost surely, 2^1440040445 is an apocalyptic number.

It is an amenable number.

1440040445 is a deficient number, since it is larger than the sum of its proper divisors (288008095).

1440040445 is an equidigital number, since it uses as much as digits as its factorization.

1440040445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288008094.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1440040445 is about 37947.8648279452. The cubic root of 1440040445 is about 1129.2538068366.

Adding to 1440040445 its reverse (5440400441), we get a palindrome (6880440886).

It can be divided in two parts, 14400 and 40445, that added together give a palindrome (54845).

The spelling of 1440040445 in words is "one billion, four hundred forty million, forty thousand, four hundred forty-five".