440198389 has 2 divisors, whose sum is σ = 440198390. Its totient is φ = 440198388.

The previous prime is 440198377. The next prime is 440198461. The reversal of 440198389 is 983891044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340697764 + 99500625 = 18458^2 + 9975^2 .

It is a cyclic number.

It is not a de Polignac number, because 440198389 - 2¹⁹ = 439674101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440198329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220099194 + 220099195.

It is an arithmetic number, because the mean of its divisors is an integer number (220099195).

Almost surely, 2^440198389 is an apocalyptic number.

It is an amenable number.

440198389 is a deficient number, since it is larger than the sum of its proper divisors (1).

440198389 is an equidigital number, since it uses as much as digits as its factorization.

440198389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 440198389 is about 20980.9053427158. The cubic root of 440198389 is about 760.7047876935.

The spelling of 440198389 in words is "four hundred forty million, one hundred ninety-eight thousand, three hundred eighty-nine".