440266649 has 2 divisors, whose sum is σ = 440266650. Its totient is φ = 440266648.

The previous prime is 440266643. The next prime is 440266679. The reversal of 440266649 is 946662044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242020249 + 198246400 = 15557^2 + 14080^2 .

It is a cyclic number.

It is not a de Polignac number, because 440266649 - 2¹² = 440262553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (440266643) 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, 220133324 + 220133325.

It is an arithmetic number, because the mean of its divisors is an integer number (220133325).

Almost surely, 2^440266649 is an apocalyptic number.

It is an amenable number.

440266649 is a deficient number, since it is larger than the sum of its proper divisors (1).

440266649 is an equidigital number, since it uses as much as digits as its factorization.

440266649 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 41.

The square root of 440266649 is about 20982.5319968778. The cubic root of 440266649 is about 760.7441055908.

The spelling of 440266649 in words is "four hundred forty million, two hundred sixty-six thousand, six hundred forty-nine".