1440320441 has 32 divisors (see below), whose sum is σ = 1773868800. Its totient is φ = 1142138880.

The previous prime is 1440320417. The next prime is 1440320443. The reversal of 1440320441 is 1440230441.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1440320441 - 2¹⁴ = 1440304057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440320443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1057601 + ... + 1058961.

It is an arithmetic number, because the mean of its divisors is an integer number (55433400).

Almost surely, 2^1440320441 is an apocalyptic number.

It is an amenable number.

1440320441 is a deficient number, since it is larger than the sum of its proper divisors (333548359).

1440320441 is a wasteful number, since it uses less digits than its factorization.

1440320441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1440320441 is about 37951.5538680566. The cubic root of 1440320441 is about 1129.3269913687.

Adding to 1440320441 its reverse (1440230441), we get a palindrome (2880550882).

Subtracting from 1440320441 its reverse (1440230441), we obtain a square (90000 = 300²).

The spelling of 1440320441 in words is "one billion, four hundred forty million, three hundred twenty thousand, four hundred forty-one".