440644469 has 2 divisors, whose sum is σ = 440644470. Its totient is φ = 440644468.

The previous prime is 440644453. The next prime is 440644483. The reversal of 440644469 is 964446044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283518244 + 157126225 = 16838^2 + 12535^2 .

It is a cyclic number.

It is not a de Polignac number, because 440644469 - 2⁴ = 440644453 is a prime.

It is a super-2 number, since 2×440644469² = 388335096120583922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440644439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220322234 + 220322235.

It is an arithmetic number, because the mean of its divisors is an integer number (220322235).

Almost surely, 2^440644469 is an apocalyptic number.

It is an amenable number.

440644469 is a deficient number, since it is larger than the sum of its proper divisors (1).

440644469 is an equidigital number, since it uses as much as digits as its factorization.

440644469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 41.

The square root of 440644469 is about 20991.5332693922. The cubic root of 440644469 is about 760.9616572033.

The spelling of 440644469 in words is "four hundred forty million, six hundred forty-four thousand, four hundred sixty-nine".