1440482389 has 4 divisors (see below), whose sum is σ = 1467661356. Its totient is φ = 1413303424.

The previous prime is 1440482377. The next prime is 1440482423. The reversal of 1440482389 is 9832840441.

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

It can be written as a sum of positive squares in 2 ways, for example, as 836944900 + 603537489 = 28930^2 + 24567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440482389 - 2¹¹ = 1440480341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440782389) 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, 13589404 + ... + 13589509.

It is an arithmetic number, because the mean of its divisors is an integer number (366915339).

Almost surely, 2^1440482389 is an apocalyptic number.

It is an amenable number.

1440482389 is a deficient number, since it is larger than the sum of its proper divisors (27178967).

1440482389 is an equidigital number, since it uses as much as digits as its factorization.

1440482389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27178966.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 1440482389 is about 37953.6874229633. The cubic root of 1440482389 is about 1129.3693165319.

The spelling of 1440482389 in words is "one billion, four hundred forty million, four hundred eighty-two thousand, three hundred eighty-nine".