1040440321 has 4 divisors (see below), whose sum is σ = 1074002944. Its totient is φ = 1006877700.

The previous prime is 1040440301. The next prime is 1040440343. The reversal of 1040440321 is 1230440401.

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.

It is a cyclic number.

It is not a de Polignac number, because 1040440321 - 2⁹ = 1040439809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040440301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16781265 + ... + 16781326.

It is an arithmetic number, because the mean of its divisors is an integer number (268500736).

Almost surely, 2^1040440321 is an apocalyptic number.

It is an amenable number.

1040440321 is a deficient number, since it is larger than the sum of its proper divisors (33562623).

1040440321 is an equidigital number, since it uses as much as digits as its factorization.

1040440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33562622.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1040440321 is about 32255.8571580419. The cubic root of 1040440321 is about 1013.3023693385.

Adding to 1040440321 its reverse (1230440401), we get a palindrome (2270880722).

The spelling of 1040440321 in words is "one billion, forty million, four hundred forty thousand, three hundred twenty-one".