1440847489 has 4 divisors (see below), whose sum is σ = 1503493056. Its totient is φ = 1378201924.

The previous prime is 1440847487. The next prime is 1440847531. The reversal of 1440847489 is 9847480441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9847480441 = 35527 ⋅277183.

It is a cyclic number.

It is not a de Polignac number, because 1440847489 - 2¹ = 1440847487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440847487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31322749 + ... + 31322794.

It is an arithmetic number, because the mean of its divisors is an integer number (375873264).

Almost surely, 2^1440847489 is an apocalyptic number.

It is an amenable number.

1440847489 is a deficient number, since it is larger than the sum of its proper divisors (62645567).

1440847489 is an equidigital number, since it uses as much as digits as its factorization.

1440847489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62645566.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 1440847489 is about 37958.4969275655. The cubic root of 1440847489 is about 1129.4647239013.

The spelling of 1440847489 in words is "one billion, four hundred forty million, eight hundred forty-seven thousand, four hundred eighty-nine".