440666636 has 12 divisors (see below), whose sum is σ = 778802640. Its totient is φ = 218151600.

The previous prime is 440666627. The next prime is 440666659. The reversal of 440666636 is 636666044.

It is a junction number, because it is equal to n+sod(n) for n = 440666593 and 440666602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544976 + ... + 545783.

It is an arithmetic number, because the mean of its divisors is an integer number (64900220).

Almost surely, 2^440666636 is an apocalyptic number.

It is an amenable number.

440666636 is a deficient number, since it is larger than the sum of its proper divisors (338136004).

440666636 is a wasteful number, since it uses less digits than its factorization.

440666636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090864 (or 1090862 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 41.

The square root of 440666636 is about 20992.0612613435. The cubic root of 440666636 is about 760.9744172668.

The spelling of 440666636 in words is "four hundred forty million, six hundred sixty-six thousand, six hundred thirty-six".