440544389 has 2 divisors, whose sum is σ = 440544390. Its totient is φ = 440544388.

The previous prime is 440544383. The next prime is 440544397. The reversal of 440544389 is 983445044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428697025 + 11847364 = 20705^2 + 3442^2 .

It is a cyclic number.

It is not a de Polignac number, because 440544389 - 2⁴ = 440544373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440544383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220272194 + 220272195.

It is an arithmetic number, because the mean of its divisors is an integer number (220272195).

Almost surely, 2^440544389 is an apocalyptic number.

It is an amenable number.

440544389 is a deficient number, since it is larger than the sum of its proper divisors (1).

440544389 is an equidigital number, since it uses as much as digits as its factorization.

440544389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 440544389 is about 20989.1493157774. The cubic root of 440544389 is about 760.9040424939.

The spelling of 440544389 in words is "four hundred forty million, five hundred forty-four thousand, three hundred eighty-nine".