440294389 has 2 divisors, whose sum is σ = 440294390. Its totient is φ = 440294388.

The previous prime is 440294383. The next prime is 440294417. The reversal of 440294389 is 983492044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440286289 + 8100 = 20983^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 440294389 - 2⁵ = 440294357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440294383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220147194 + 220147195.

It is an arithmetic number, because the mean of its divisors is an integer number (220147195).

Almost surely, 2^440294389 is an apocalyptic number.

It is an amenable number.

440294389 is a deficient number, since it is larger than the sum of its proper divisors (1).

440294389 is an equidigital number, since it uses as much as digits as its factorization.

440294389 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 43.

The square root of 440294389 is about 20983.1930125041. The cubic root of 440294389 is about 760.7600827252.

The spelling of 440294389 in words is "four hundred forty million, two hundred ninety-four thousand, three hundred eighty-nine".