440020636 has 24 divisors (see below), whose sum is σ = 876564864. Its totient is φ = 191312880.

The previous prime is 440020621. The next prime is 440020667. The reversal of 440020636 is 636020044.

It is a self number, because there is not a number n which added to its sum of digits gives 440020636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216390 + ... + 218413.

It is an arithmetic number, because the mean of its divisors is an integer number (36523536).

Almost surely, 2^440020636 is an apocalyptic number.

440020636 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

440020636 is a deficient number, since it is larger than the sum of its proper divisors (436544228).

440020636 is a wasteful number, since it uses less digits than its factorization.

440020636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434841 (or 434839 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 440020636 is about 20976.6688489855. The cubic root of 440020636 is about 760.6023825311.

The spelling of 440020636 in words is "four hundred forty million, twenty thousand, six hundred thirty-six".