440689768 has 16 divisors (see below), whose sum is σ = 827302500. Its totient is φ = 220075776.

The previous prime is 440689741. The next prime is 440689783. The reversal of 440689768 is 867986044.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 388011204 + 52678564 = 19698^2 + 7258^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 26593 + ... + 39856.

Almost surely, 2^440689768 is an apocalyptic number.

It is an amenable number.

440689768 is a deficient number, since it is larger than the sum of its proper divisors (386612732).

440689768 is a wasteful number, since it uses less digits than its factorization.

440689768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67284 (or 67280 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 440689768 is about 20992.6122243041. The cubic root of 440689768 is about 760.9877323601.

The spelling of 440689768 in words is "four hundred forty million, six hundred eighty-nine thousand, seven hundred sixty-eight".