1440382655 has 4 divisors (see below), whose sum is σ = 1728459192. Its totient is φ = 1152306120.

The previous prime is 1440382649. The next prime is 1440382673. The reversal of 1440382655 is 5562830441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5562830441 = 7 ⋅794690063.

It is not a de Polignac number, because 1440382655 - 2¹⁸ = 1440120511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144038261 + ... + 144038270.

It is an arithmetic number, because the mean of its divisors is an integer number (432114798).

Almost surely, 2^1440382655 is an apocalyptic number.

1440382655 is a deficient number, since it is larger than the sum of its proper divisors (288076537).

1440382655 is an equidigital number, since it uses as much as digits as its factorization.

1440382655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288076536.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 1440382655 is about 37952.3735094394. The cubic root of 1440382655 is about 1129.3432513934.

The spelling of 1440382655 in words is "one billion, four hundred forty million, three hundred eighty-two thousand, six hundred fifty-five".