440020135 has 12 divisors (see below), whose sum is σ = 533365704. Its totient is φ = 348490400.

The previous prime is 440020123. The next prime is 440020177. The reversal of 440020135 is 531020044.

It is not a de Polignac number, because 440020135 - 2¹⁷ = 439889063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46692 + ... + 55318.

It is an arithmetic number, because the mean of its divisors is an integer number (44447142).

Almost surely, 2^440020135 is an apocalyptic number.

440020135 is a deficient number, since it is larger than the sum of its proper divisors (93345569).

440020135 is an equidigital number, since it uses as much as digits as its factorization.

440020135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8834 (or 8733 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 440020135 is about 20976.6569071432. The cubic root of 440020135 is about 760.6020938613.

Adding to 440020135 its reverse (531020044), we get a palindrome (971040179).

Subtracting 440020135 from its reverse (531020044), we obtain a palindrome (90999909).

The spelling of 440020135 in words is "four hundred forty million, twenty thousand, one hundred thirty-five".