440606389 has 2 divisors, whose sum is σ = 440606390. Its totient is φ = 440606388.

The previous prime is 440606381. The next prime is 440606417. The reversal of 440606389 is 983606044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254147364 + 186459025 = 15942^2 + 13655^2 .

It is a cyclic number.

It is not a de Polignac number, because 440606389 - 2³ = 440606381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440606381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220303194 + 220303195.

It is an arithmetic number, because the mean of its divisors is an integer number (220303195).

Almost surely, 2^440606389 is an apocalyptic number.

It is an amenable number.

440606389 is a deficient number, since it is larger than the sum of its proper divisors (1).

440606389 is an equidigital number, since it uses as much as digits as its factorization.

440606389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 440606389 is about 20990.6262174333. The cubic root of 440606389 is about 760.9397360879.

The spelling of 440606389 in words is "four hundred forty million, six hundred six thousand, three hundred eighty-nine".